Cheap coating opportunity for USA prisms [Text View]

rcgustafson

03-20-07, 11:30 PM

I have an opportunity to get inexpensive BBAR coating on DIY prisms at the end of the month. I will be in Orange County, California, from March 30-April 4.

Richard at L&L Optics in Mission Viejo, California, www.llopt.com, quoted me $50. per pair of 5x7 prisms if I can put together a group purchase of at least 12 pairs. If I have a group order of 6 pairs the cost of coating is $75. each pair. I am in for 2 pairs myself, which I can pick up from Joe Lopez at www.CrystalFactory.com March 30 in Buena Park. (They cost $60. each single prism for the CWD57 (non-engraved) and no further group discounts are available there.

If you don't have prisms but are thinking of doing a diy anamorphic lens in North America, this is a good chance to buy the prisms over the phone and have me pick them up and take them to L&L for coating. Then they will be shipped back to you (by me or L&L--not sure yet). Shipping cost is not included in the quotes.

If you already have the prisms but want to get them coated at a great price, you can ship them to me first and I will carry them to L&L. I must have them at my residence in Northern California by Thursday, March 29 at the latest if I am going to hand carry them.

The cost to coat one pair is $525. and I find this prohibitive. So I need a few intrepid souls to risk sending their prisms to me for the group deal. If there are 4 to 10 pairs out there looking for anti-reflection coating, send me a PM or reply on this thread with questions. We need to move quickly if this is going to happen. No one is committed (including me) until I have the minimum number. I can't take too many, either. If there is a lot of interest maybe someone else can follow up with logistics on a second order.

L&L doesn't want to receive the prisms directly in onesy-twosies at the group rate. I asked about that.

If you PM your email I can send you a copy of the original quote from L&L for your perusal.

Richard Gustafson
Sebastopol, California

CAVX

03-20-07, 11:44 PM

Good find :)

Mark

rcgustafson

03-21-07, 12:54 AM

Thanks. By the way, since cheap coating is now possible, doesn't it make sense to revisit the advantages of the 4 prism lens over the 2 prism version?

adude

03-21-07, 12:58 AM

I am in. I live in Orange County and was already thinking of visiting Crystal Factory. This comes at the right time. I will buy these prism and make an arrangement to get to you.

bluesboyjr

03-21-07, 07:07 AM

Count me in for one pair to get coated. I already have the 5x7 prisms so I will be shipping mine to you. Let me know any further info as it becomes available and send me a pm with shipping info.
Thanks

GetGray

03-21-07, 09:20 AM

Excellent opportunity.

chrisinla

03-21-07, 12:36 PM

I'm in los angeles and have a pair of 5x7's on order with massillon plaque. assumming i get these in the next week or so I would definitely be interested. I don't want to complicate things but I'd rather not ship all of 30 miles... maybe we can work something out. It would be great if this works out, thanks. chris

rcgustafson

03-21-07, 02:55 PM

If Chris' wedges come through from Massillon we will have at least 6 pairs. There are now 5 other pairs committed, including my 2. I'd like to wait a little longer today before giving the green light on this. One more pair would make it a certainty at the $75. level, which ought to be good enough for everybody. And we have a few more days to bring the price down to $50./pair if more people sign up.

Chris, how about following up on delivery status with Massillon?

Those who would order from Crystal Factory--wait a little--I'd rather work out a deal to pick up your wedges in person at their SoCal business location instead of having them shipped to you, then to me, then I carry them with me back to CF when I pick up my own wedges!

Richard

bluesboyjr

03-21-07, 09:29 PM

rcgustafson ,
Have you thought about how we are going to identify our prisms once they are sent to you? I know atleast the Massillion and the Crystal Factory have different angles. Is there any way to ensure we get the same prisms back?
Thanks.

roar

03-21-07, 10:38 PM

rcgustafson,

Has anyone had this done yet? Do we know if this coating will improve the picture quality or help with some of the reflections and ca that have been seen (Limited as it may be). Or are you going into this coating kind of 'blind' and hoping it improves it?

Let me ask it a different way...

Do you have a DIY lense set up already where you can compare the reflections or ca you are getting now to what it will look like after coating?

schen

03-21-07, 10:48 PM

Richard,
Count me in for two pairs.
I have not ordered the prisms yet so let me know when I should do it and what instructions to leave them.
Stan

rcgustafson

03-22-07, 12:17 AM

Okay, as of Wednesday night we have enough to qualify at least for the $75./pair price with a few days to go. I have 6 commitments and 4 maybes. So I will proceed with the deal. Joe at Crystal Factory was out today but I will call him Thursday to check stock, then finalize things with L&L. Then I will get back to everybody. If you are in, please PM me with phone numbers or regular email addresses if you have not already done so.

Regarding who owns which prism: When you send them to me (unless purchasing new) mark the thick end piece with tape and your name written on the tape so I can tell which prisms are yours. More detailed shipping and payment instructions tomorrow.

If you are getting new ones from CF I will attempt to match them for size...although it is unclear that this makes any difference and the tolerances are supposed to be pretty good.

As for testing the coatings...no, I have no comparison and am going on the professional reputation of L&L. As for whether any coating is superior to non-coating, this seems to be beyond argument. All users and manufacturers known to me prefer coated to non-coated. If you are concerned about the quality, you can take a look at www.llopt.com or call them and judge for yourself.

Specs from the rate quote:

coat both sides with BBAR. ABS .5% R avg < .3% from 425-675nm AOI 0-20 degrees

Richard

Wilson-Flyer

03-22-07, 07:01 AM

Good find :)

Mark

Hi Guy! :)

I was wondering if you think this procedure is beneficial for folks using your Aussiemorphic Lens. Can you tell from what these coating are called if they are worth the expense and downtime and could (would you mind) you explain in layman's terms what the benefit might be in going through this process (assuming your response is positive to begin with, of course).

Pending Mark's positive response, I'm in if it's not too late. I hope you're willing to give this a couple more days to mature. I feel confident that the $50 is going to be EASY to hit if you can/will just give it a few more days.

Thanks,
bob

CAVX

03-22-07, 07:25 AM

I think this a great opportunity for you guys.

I've made contact with llopt and they have referred me to a company in Australia that can (hopefully) do this here. I am waiting for them to return my email...

Mark

rcgustafson

03-22-07, 09:41 PM

I spoke with Joe at Crystal Factory Thursday morning. He does not foresee any difficulty getting the wedges we want (CWD57) by March 30. However, I asked him to double check with his source and get back to me by phone. I did not hear from him so I called late in the day and he was busy with another customer. I left my number again, but by that time it was past 5 pm and I guess he quit for the day. So, I will call again Friday morning to be positive that he will have stock when I want to pick it up on March 30. Then I will contact everybody with instructions.

It may actually be possible for me to postpone the pickup from CF until April 4.

Meanwhile, we are up to eight confirmed pairs and two maybes. If those two convert and we add two more to the group before my pickup we will cut the price again. I am counting as maybes the two who have pending orders from Massilon Plaque.

In the worst case, we can get this done through shipping from CF to L&L instead of me hand carrying the wedges to L&L. So it looks like this is really going to happen!

I think it is safe to go ahead and ship existing prisms to me. I could still drop those pairs at L&L pending arrival of the new ones. I will now PM those who need to get their pairs out to me in California. However, most of you are buying new ones after I give the go ahead (hopefully Friday).

More info coming on Friday.

Richard

rfpublic

03-23-07, 11:40 AM

Hi Richard,

I would be interested in getting a pair of coated prisms. So add me to the list. I will place an order for a pair of prisms from Crystal Factory that you can get when you pick up your order.

I already built a anamorphic lens with prisms from Mission Plaque. It works very well. Is the angle on the Crystal Factory prism different?

Best regards,
Randy Freeman

rcgustafson

03-23-07, 02:47 PM

Randy,

The CF prisms reportedly have a slightly greater angle than the Massillon Plaque--I assume that is what you meant instead of "Mission Plaque", with which I am unfamiliar. Some suggest that a larger angle is better, and a couple have not noted a significant difference. It certainly isn't worse.

Go ahead with your CF order! See my next post, too.

Richard

rcgustafson

03-23-07, 02:58 PM

Good news! Joe at CF confirmed today that he has at least 20 wedges available to us by March 30. Maybe more if we inquire soon enough. We have 16 of these in demand by current group purchasers. If you are on the list, go ahead and call CF now!! Ask for Joe, order CWD57 (non-engraved) and have him hold them for pickup March 30 by Gustafson. Pay him by credit card now.

We have 11 confirmed pairs going in for coating. A few are being sent to me by current owners, and the rest will be new from CF. The 12th order (Jones) is pending confirmed shipment from Massillon and then to me but the buyer is thinking of ordering from CF to make sure.

I think we are going to make the 12 minimum limit for the lower price!

Turnaround time at L&L is 1-2 weeks not including shipping time.

Still time to get in on this opportunity for a few more people.

Richard

Papajin

03-23-07, 06:57 PM

Just called a few minutes ago to place my order with CF... When you first call the lady that answers will start asking you questions like what company you're with, and if Joe is expecting a call from you, etc. Just tell her it's about "the wedges" and she'll likely know what you're talking about right away. That was the magic word that got me in. :)

benthx

03-23-07, 07:14 PM

Ranger

03-23-07, 07:22 PM

Alright. I am in. Joe just took my order for one pair. He referred to Richard as the "wedge man" lol. He said a bunch of guys have called...

Richard: I will pm you my contact info. Thanks

rcgustafson

03-23-07, 08:52 PM

Okay, we are up to 14 commitments for prism pairs to be coated. If anybody flakes out we are still above the magic 12 number. I think I am going to call these things prisms when they get to L&L and wedges before that.

Joe just took my order for one pair. He referred to Richard as the "wedge man" lol.

Well, I guess I'd rather be WedgeMan than WedgieMan. Next time I'd prefer to be OLEDMan or something a little more techie... :D

Richard

CAVX

03-23-07, 09:39 PM

Well done Mark go for it!!!

You have my support. ;)

Ben

Thanks Ben :)

Even better news is that I have a new supplier that can provide fully coated BK7 in the same size as the prisms I am currently using...

Exciting time ahead - Get ready for the "Aussiemorphic Lens" MKII...

Mark :cool:

f430

03-24-07, 02:11 PM

Are there directions somewhere on how to put the two prisms together completing the DIY lense?

What's the difference between using these crystals and a multi-thousand $ new lense?

Papajin

03-24-07, 02:34 PM

Are there directions somewhere on how to put the two prisms together completing the DIY lense?

What's the difference between using these crystals and a multi-thousand $ new lense?

The main DIY thread is HERE (http://www.diyaudio.com/forums/showthread.php?threadid=4677&perpage=10&pagenumber=1), but someone distilled a lot of the info found in that thread and made a nice overview page HERE (http://www.zuggsoft.com/theater/prism.htm).

The difference is of course cost mainly. I'm sure there's possibly some quality differences as well, but how much of a difference is unknown (at least to me anyway). Then of course there's the fact you do have to spend some time building an enclosure to hold the prisms. With these coated prisms, I would think we should be able to approach the quality of similar commercial lenses.

chrisinla

03-24-07, 03:50 PM

do we know if this will coat all three sides? could the short side be one of the reflection sources? thanks, chris

rcgustafson

03-24-07, 04:33 PM

Chris,

Only the two large surfaces (5"x7") are coated. The way to deal with reflections off the ends is to apply some electrical tape or other covering to block any light output through the ends. This is discussed in the diy.audio threads.

Richard

nelson1138

03-24-07, 08:44 PM

I am definitely a newbie when it comes to anamorphic lenses but after reading the threads on CIH and seeing the screen shots I WAS TOTALLY SOLD!! The only down side was the cost of lenses but after stubbling on this thread today and the associated links posted here a DIY lense would be very easy for me to build. Is it to late to get in on this fantastic opportunity. I live in Cypress, CA literally 10 minutes from the Crystal Factory and was thinking I could go over there tomorrow and see about purchasing some "wedges". If there is still room I would be very interested in participating.

adude

03-24-07, 09:11 PM

Nelson,

I live in Garden Grove and went there today. Joe do not have the wedges right now, cause he is getting them on tuesday. This will save you a trip.
He said he is ordering more, better to call him and make sure he gets it in time.

nelson1138

03-24-07, 09:12 PM

Nelson,

I live in Garden Grove and went there today. Joe do not have the wedges right now, cause he is getting them on tuesday. This will save you a trip.

Thanks for the info!

Lindahl

03-25-07, 01:01 AM

I'd also like in on this opportunity. Richard, if I put in my order for the wedges tomorrow, can you coat mine in the group coating? I'd want to have 2 pairs coated to make a 4 prism lens. Thanks for your hard work in putting together this wonderful opportunity - a true credit to the community, here.

f430

03-25-07, 01:24 AM

The main DIY thread is HERE (http://www.diyaudio.com/forums/showthread.php?threadid=4677&perpage=10&pagenumber=1), but someone distilled a lot of the info found in that thread and made a nice overview page HERE (http://www.zuggsoft.com/theater/prism.htm).

The difference is of course cost mainly. I'm sure there's possibly some quality differences as well, but how much of a difference is unknown (at least to me anyway). Then of course there's the fact you do have to spend some time building an enclosure to hold the prisms. With these coated prisms, I would think we should be able to approach the quality of similar commercial lenses.

Thanks so much for that. 60+60+50=$170 plus shipping = $200 plus materials for case $? Plus my time and mental anguish figuring it out, trying to pound together some ugly box even Homer Simpson would laugh at.

-or-

Uncoated $350 ausiemorphic kit done deal shipped no thinking.

Part of me wants the coating. I am assuming the coating is to stop the right-most part of the image from being reflected onto the left-most part of the screen?

rcgustafson

03-25-07, 04:41 AM

The coating reduces or eliminates rainbow-like reflections that otherwise tend to appear on the screen or side walls in the room. They can be annoying distractions.

There is still time to join the group purchase for anyone who wants to order from Crystal Factory. It is probably too late for people to ship existing prisms to me first if they are not already in a UPS or Fedex system (unless you overnight them...maybe 2 day air). The only limitation will be how many new prisms CF can supply for pickup on March 30. Phone in your order on Monday if possible. There is no limit on the number that L&L will coat. I'm sure they are happy to have the business.

Everyone who gets a confirmed order from CF should send me a PM so I can track the total. Final shipping cost may include shipping from L&L to me in bulk and then reshipping from me to the individual owner. I'd like to avoid this but L&L is not too keen on a lot of little orders.

Thanks,

Richard

adude

03-25-07, 01:33 PM

Joe at CF is getting these prisms on Tuesday. So, better to hurry your orders.

Lindahl

03-25-07, 03:55 PM

I've placed my order for 4 wedges (2 pairs). Thanks Richard!

f430

03-25-07, 04:56 PM

I've placed my order for 4 wedges (2 pairs). Thanks Richard!

Me too only one pair. Richard your efforts are sincerely appreciated. PM Sent with my info.

nelson1138

03-26-07, 01:35 PM

Just got off the phone with Joe and I got 4 "wedges" waiting. I am giddy with excitement about this!

Richard: I PM'd you to

mrehrer

03-26-07, 01:54 PM

Richard-

Thanks again for organizing this. I ordered 1 pair which is set aside for you to pick-up.

Take care,
Matthew

rcgustafson

03-26-07, 04:50 PM

As of 1:30 pm Thursday March 29, here are the totals. If you have not sent me a PM with all of your contact info and confirmation of a placed order, please do so. And PM me with any corrections or omissions, too. We are in great shape.

--Richard

rcgustafson-- 2 pair CF confirmed order
mrehrer--1 pair CF confirmed order; pickup finished pair in Bay area
nelson1138--2 pair CF confirmed order
f430--1 pair CF confirmed order
lindahl--2 pair CF confirmed order
adude--1 pair CF confirmed order
chrisinla--1 pair Massillon; confirmed meeting in Anaheim
papajin--1 pair CF confirmed order
ranger--1 pair CF confirmed order
schen--2 pair CF confirmed order
bluesboyjr--1 pair CF confirmed shipped and received by rcgustafson
phoveo--1 pair CF confirmed order
3sixty--1 pair from Massillon (and 1 pair from CF) confirmed shipped and received
rfpublic-- 1 pair CF confirmed
klemsaba--1 pair CF confirmed

hdjii--1 pair CF unconfirmed
wilson-flyer--1 pair Massillon unshipped but trying

nelson1138

03-26-07, 06:32 PM

WOW!!! I think we're gonna need a bigger boat!

f430

03-26-07, 08:36 PM

Ha ha I feel giddy and I don't even have a projector yet. How silly is that. I've been lurking and this has opened a HUGE can, no wait, barrel of worms!

rcgustafson

03-27-07, 01:47 PM

I have updated the buy list in my post #39 above.

klemsaba

03-27-07, 06:10 PM

I ordered my 2 wedges today! Thanks for getting this together Richard!

CAVX

03-29-07, 08:22 AM

Uncoated $350 ausiemorphic kit done deal shipped no thinking.

Just to let you guys know, the NEXT BATCH (http://cavx.blogspot.com/2007/04/4-prism-lens.html) will be coated...

Mark

rcgustafson

03-29-07, 04:59 PM

I have updated my post #39 to reflect the current totals. Thanks to bluesboyjr and 3sixty for the excellent packing jobs. Your wedges are safe with me (so far). :D

I spoke with Richard LaRue at L&L Optics and he does want to ship the finished prisms to me in bulk. I will then send them out individually by UPS ground unless somebody notifies me that they want to pay extra for 3 day air. Each pair weighs 10 or 11 pounds when packed in a box. Shipping will be from 95472 so you can figure out your preferred method and PM me if it is not by ground. As a rule of thumb, getting a pair here from Virginia cost $16 by ground and $38. by 3 day air.

We have quite a few prism pairs to coat and Richard now estimates two weeks turnaround plus shipping time. We will all be eager to get them installed.

For those that missed this group purchase, you can always organize another one. And for those who would like to simplify the whole diy process, it sounds like Mark (CAVX) will have a fine opportunity for you pretty soon.

Richard

schen

03-29-07, 05:26 PM

Richard,
I assume that you would pay lloptics the cost of coating for the whole batch and we will then reimburse you individually the cost of coating plus shipping when ready. Right?
Again, what an opportunity you provided us. Thank you.
Stan

rcgustafson

03-29-07, 06:21 PM

Yes, Stan. That's the plan, man.

If I have to pay up front for the coating (didn't ask that) then I may ask the group to fork over some reimbursement cash before we get all the way to the final shipping expense. More on that after I get down to Orange County.

Richard

norpus

03-30-07, 06:17 PM

Just to let you guys know, the NEXT BATCH (http://cavx.blogspot.com/2007/03/watch-this-space.html) will be coated...

Mark
Excellent news Mark, I'll be ordering a pair to try for sure

rcgustafson

03-31-07, 01:37 AM

Everything went according to plan on Friday. I met ChrisinLA, who handed off his wedges, picked up 17 pairs of Crystal Factory wedges and delivered 20 pairs total to Richard at L&L Optics. Everybody was very nice and they were all curious about our projects. Richard gave me a mini-tour of the optics lab. They were working on some beam splitters, filters and other items at the time. I took a couple of pictures of the machinery and I will post them here after I get home late next week. Joe at CF was stuck in traffic so I didn't meet him, but the others at CF took care of me. I watched Javier work on a design for the retirement trophy for Tim Salmon. CF does a lot of work for the Angels baseball organization. Also the NHRA and other known sports institutions.

L&L has worked with the observatories in Hawaii and is in the process of planning a move to bigger facilities with clean room in Santa Ana, Ca. Good people. They are going to invoice me after they figure out the shipping charges so it will be a little while before I ask anybody for reimbursement.

That's all for now. I will be touring the Mt. Palomar observatory in a couple of days--keeping the lens theme going.

Richard

CAVX

03-31-07, 01:39 AM

Sounds good. How long before you guys get them back?

Mark

T_MINTON

04-02-07, 03:46 PM

use US POSTAL service for shipping...FLAT RATE PRIORITY MAIL is less than $10 for up to 70 lbs anywhere in the USA! There are specific boxes/sizes that qualify.. I am pretty sure you can save some money here and get boxes free.

rcgustafson

04-03-07, 12:58 AM

Thanks for the shipping suggestion. I will check that out.

As stated in my earlier post, the timeframe is now about two weeks for coating and then a few more days of shipping to northern California plus reshipping to the individual owners.

By the way, L&L said it is no problem to mark the specific prisms according to owner and that is what they are doing with ours. They do it all the time on various projects.

Mt. Palomar was fascinating. Can't wait for the www.tmt.org

Lindahl

04-13-07, 10:17 AM

Any updates?

rcgustafson

04-13-07, 05:06 PM

Two more avs guys got into the group purchase at the last minute and their wedges are due to be received at L&L no later than today, so I guess that means I won't receive the bulk shipment of finished prisms until sometime next week--probably late in the week.

Meanwhile, I posted a few photos to keep you entertained. I put them in my public photo gallery at http://rcgustafson.dell.shutterfly.com The password is <bananas>. The collection includes photos I took at CF and L&L.

Richard

bluesboyjr

04-20-07, 09:15 PM

Any updates, Richard?
Thanks.

Metric

04-20-07, 10:47 PM

Just to let you guys know, the NEXT BATCH (http://cavx.blogspot.com/2007/03/watch-this-space.html) will be coated...

Mark

When and how much?

Mupi

04-20-07, 11:15 PM

When and how much?

The current price is $535 for the uncoated lens.
I wonder why it is so much when I can get 2 prisms for
under $100 in US!

I guess the prism manufacturers and the coating guys havent
realized that there is a potential market in US for these prisms.

I just ordered 2 prisms (uncoated) and the person asked me if this
is for a projector. I guess once they realize that there is a potential
market, I am sure the prices of the commercial lens (which now are
riculously priced) will come down.

I already have 2 small prisms which I bought from ebay for $8 each and
trust me it is no rocket science to align the prisms to stretch the image.

Even if you dont know the angles all you have to do is just mark
the 2.35 image you want on the wall with painters tape and adjust
the prisms so that the image fills that mark. There are also many web sites
that give the angles for the given zoom ratio.

Will post some pictures once I set up the prisms.

CAVX

04-20-07, 11:29 PM

The current price is $535 for the uncoated lens.
I wonder why it is so much when I can get 2 prisms for
under $100 in US!

That price was calculated for the new prisms (the photo is of the current lens). The price has to be set where it is so that the distributor and retailer both make money. The new prisms BTW are not trophies, but custom ground to my spec.

I would like to do another group buy, but I want minimum commitment given the financial outlay I have already made...

I just ordered 2 prisms (uncoated) and the person asked me if this
is for a projector. I guess once they realize that there is a potential
market, I am sure the prices of the commercial lens (which now are
riculously priced) will come down.

Or the prism prices go up which is what happened here...

Mark

rcgustafson

04-22-07, 02:41 AM

The prisms are ready. I received a call Friday afternoon and was asked to send a check for the total cost. It went out in Saturday's mail, so I would anticipate receiving the bulk shipment sometime late next week. As soon as I get it I will turn it around. (ChrisinLa will be picking up his set at L&L after my check arrives.)

I would like all buyers to send me their payment now by PayPal. I will PM each of you with my private email address and billing address in case you don't already have them.

Each buyer owes me $50. per pair of prisms for the coating, plus $10. per pair shipping from L&L to me, plus $4. per pair in tax, plus whatever it costs to ship from me to you. Please go to usps.com and calculate the cost of shipping from me at my 95472 zip code to you. Use the regular package size and allow 11 pounds per pair--that's 22 pounds if you have 4 prisms. Notify me of your preferred speed of shipping (ground, express, etc) and add the total to your bill. Finally, you have to add 3.5% to the sub-total because of the merchant fee that PayPal will charge my account. Send me your PayPal payment at my private email address ASAP. Please email me a separate note stating your shipping address (some of you have done this earlier, but it would expedite matters if you would send the info again along with your payment confirmation.) I'd rather take this info at my private email address than in PM form on this forum. If you don't have a PayPal account and are unwilling to create one you can send me a personal check.

All pre-owned prisms will be returned to their original owners. New prisms will be hand matched by me before I ship. I'll do the best I can, though I'm not sure it makes much (if any) difference.

I think that covers it! Now I will start sending PM's to each of you with my contact info. I might not get that done until late Sunday morning sometime.

My AX-100 is set up. My RS-1 has arrived. My Lumagen HDP is currently on order. Onward!

Richard

Mupi

04-22-07, 11:17 AM

That price was calculated for the new prisms (the photo is of the current lens). The price has to be set where it is so that the distributor and retailer both make money. The new prisms BTW are not trophies, but custom ground to my spec.

I would like to do another group buy, but I want minimum commitment given the financial outlay I have already made...

Or the prism prices go up which is what happened here...

Mark

Sam is able to get 2 coated prisms for 99 euros (some $136 USD)
I presume they are also custom cut. I am sure his mount is easy to
make and wont cost more than 50 bucks.

And now we can get prisms coated in US for affordable cost.
I wonder what is the major difference between the prisms that
we can get in US for $50 a piece to the custom cut prisms or the
prisms used in riduculously priced commercial lens, other than
the fact that they are trophies. I guess the commercial lenses are
expensive just because of monopoly. If there are more manufacturers
obviously the price will drop. The prism prices arent going to go up.
After all it is a piece of glass and they are used for variousl other
applications including trophies.

Moreover when I have a projector like IN72 which costs $599 or less
I wouldnt want to spend a lot of money for the lens.
These group buy options for a couple of hundred bucks is good enough.

Like I said I tried the $8 ebay prisms and the picture was fine. I am sure
the US prisms (this thread) or sam's prisms would be just fine especially as they are coated.

CAVX

04-22-07, 12:17 PM

Sam is able to get 2 coated prisms for 99 euros (some $136 USD)
I presume they are also custom cut. I am sure his mount is easy to
make and wont cost more than 50 bucks.

True, but his prisms are just 70mm high. Mine are 140mm high. Both are BK7 with an optic coating...

And now we can get prisms coated in US for affordable cost.
I wonder what is the major difference between the prisms that
we can get in US for $50 a piece to the custom cut prisms or the
prisms used in riduculously priced commercial lens, other than
the fact that they are trophies.

I guess the commercial lenses are expensive just because of monopoly. If there are more manufacturers obviously the price will drop. The prism prices arent going to go up. After all it is a piece of glass and they are used for variousl other
applications including trophies.

With the pro lenses, your paying for a much finer finish. Whilst the trophies look smooth to the eye, under magnification they are not that smooth. True optic polishing takes time and costs money - time is money...

Moreover when I have a projector like IN72 which costs $599 or less
I wouldnt want to spend a lot of money for the lens.
These group buy options for a couple of hundred bucks is good enough.

Like I said I tried the $8 ebay prisms and the picture was fine. I am sure
the US prisms (this thread) or sam's prisms would be just fine especially as they are coated.

Hope it works out for you...

Mark :)

rcgustafson

04-29-07, 07:21 PM

The prisms were shipped in bulk from L&L last week and arrived at my home on Friday.

I will ship them out to everybody Monday, April 30. You should have them shortly!

Richard

klemsaba

04-29-07, 07:30 PM

Cool! I know what next weekend's project will be...

Thanks again for doing this!

CAVX

04-29-07, 11:33 PM

Just a quick update: My new prisms have arrived and I am very impressed...

Take a look HERE (http://cavx.blogspot.com/2007/04/4-prism-lens.html)...

Mark

RandyFreeman

05-02-07, 07:03 PM

Hi Richard,

Do you have a report yet on how the new coated prisms worked with your projector?

Randy

rcgustafson

05-04-07, 12:50 AM

I was very busy this week and have not had a chance to set up the prisms in my house. I have a Panny AX-100 but I am watching the NBA playoffs on my new RS-1. Go Warriors!

I finally got the rest of the diy prisms into the mail this afternoon. It took a long time to repack and ship them. A few went out earlier in the week, but most were sent today by USPS priority mail. Look for them by Saturday. Delivery isn't guaranteed for two days, though, so some of you may not see them until Monday. It was the best I could do.

I ended up not trying to match them. Matching is of questionable value anyway. I set four random prisms on my dining room table and found them virtually indistinguishable in depth and angle. There was about 1 mm variation in the long dimension, which should have no impact on the image. I elected to keep the four I had opened and ship the rest untouched. They are all individually wrapped in paper inside of their jewel boxes and I did not wish to handle them. One of mine has a tiny chip on a corner but that shouldn't matter. Nothing matters at the moment--the Warriors are up big with nine minutes to Go!!

klemsaba

05-05-07, 11:27 PM

Just wanted to say I received my prisms today. I did a quick and dirty setup and all I can say is WOW! I'm watching Star Wars Episode 4 in HD right now. The detail is amazing.

These 5x7 coated prisms are much better than my 4x6 prisms I had back in December (I broke them). I have pretty good focus across the screen and minimal CA (my projector is 18' from the screen). Geometry is pretty good as well. You can really only see the 'defects' when viewing test patterns.

When I first arranged my prisms I had reflections all over the place. I did some rearranging and I now have very minimal reflections. The credits from the movie CARS is just about perfect. Here is a quick sketch of how my quick setup looks...

http://members.cox.net/klemsaba/prism/prismsketch.jpg

Thanks Richard for getting this together for us!

CAVX

05-06-07, 02:04 AM

Klemsaba,

Have you built a case yet?

Do you have block out on the ends of the prisms?

Adding these things will only make it even better viewing experience...

And a quick update HERE (http://cavx.blogspot.com/2007/05/look-at-blu-ray-disc.html) with BD and my lens at 720P...

Mark

klemsaba

05-06-07, 07:04 AM

I haven't built a case or blocked off the ends yet. I pulled my projector down from the ceiling and placed everything on a table so I could 'play' with the prisms. I did put the prism cases along the sides to help block any stray light shining on the walls.

One strange observation is my prism orientation seems backwards to what I see other people doing.

http://members.cox.net/klemsaba/prism/prismsketch.jpg

Building a case is next weekend's project.

CAVX

05-06-07, 09:23 PM

If your drawing is the same as what you have done with your prisms, then you are correct for HE...

Mark

rcgustafson

05-07-07, 01:30 AM

Steve Scherrer

05-07-07, 10:27 AM

Klemsaba,

That is an exciting report, especially since you had a previous set of different prisms. Let's hear from others who now have their coated 5x7 prisms. I'd also love to hear from those who have mixed sets of CF and Massillon prisms. Any detectable differences?

I was down for the count with food poisoning all day today but I am looking forward to setting mine up soon. I will compare the performance of two versus four prisms.

What is the best way to black out the ends of the prisms? I have heard some people use electrical tape but I wonder if it would peel too easily.

Richard

The idea is to minimize reflections. I took black paint (use the black you buy in bottles at your local hobby store instead of the black you can buy at home depot. The black at the hobby store is much more black than home depot), add a bunch of powdered corn starch to it and paint a few coats on the edge of the prisms. You have to be careful, because once it dries, it will scratch easily off, but this provides a very black, inky non-reflective coating to the ends of the prisms.

f430

05-07-07, 05:31 PM

Thank you Richard I received my prism today all the way up here in Canada. Great packing job, crystals look perfect.

Now my home theatre setup consists of:

1) DIY Prisms
2) uh... better get cracking :)

Mupi

05-08-07, 12:33 AM

Klemsaba,

That is an exciting report, especially since you had a previous set of different prisms. Let's hear from others who now have their coated 5x7 prisms. I'd also love to hear from those who have mixed sets of CF and Massillon prisms. Any detectable differences?

I was down for the count with food poisoning all day today but I am looking forward to setting mine up soon. I will compare the performance of two versus four prisms.

What is the best way to black out the ends of the prisms? I have heard some people use electrical tape but I wonder if it would peel too easily.

Richard

I bought the Massillon Plaque 5''x7'' uncoated prisms. They have almost
like a mirror finish and give reflections all over the place and also on the
image. The image quality wasnt bad. I am not sure how the reflections
can be prevented by changing the orientation.

Anyway...I just returned it.

I would like to know if the Crystal Factory prisms are not from the same
manufacturer. Is CF a glass manufacturer or just a distributor.

why would the coated prisms also give out reflections?

isnt the primary purpose of the coating to avoid the reflections?

Just curious.

CAVX

05-08-07, 02:40 AM

Mupi,

You've stated uncoated prisms, but did you block off the ends of the prisms as well?

That will greatly reduce stray light, but the coating just make it that much better...

Mark

Steve Scherrer

05-08-07, 10:44 AM

I bought the Massillon Plaque 5''x7'' uncoated prisms. They have almost
like a mirror finish and give reflections all over the place and also on the
image. The image quality wasnt bad. I am not sure how the reflections
can be prevented by changing the orientation.

Anyway...I just returned it.

I would like to know if the Crystal Factory prisms are not from the same
manufacturer. Is CF a glass manufacturer or just a distributor.

why would the coated prisms also give out reflections?

isnt the primary purpose of the coating to avoid the reflections?

Just curious.

You want as perfect a surface as possible to get a better image on the screen. The better the prism surface, the more reflections you probably are going to experience, but that is where the the ar coating comes in. I kind of laughed when I read your post, because to eliminate the reflections from the surface, without coating, you have to introduce some kind of abrasion or something to the surface which will seriously influence the quality of the image.

fact is, these prisms (and any prism used in this context) are going to cause reflections. There are three ways to minimize them:
1. Prism orientation. The reflections comes from the way the beams bounce off the surfaces of the prisms. You can reduce the reflections on the screen by getting the right orientation.
2. Black out the edges (see above). Some of the more serious reflections come from light bouncing off the edges, and since this is the only part of the prism you can safely black out, it is recommended to do so.
3. Coat the prisms with antireflective coating. I'm still waiting to hear side-by-side comparisons of the prisms with and without coating.

I would imagine crystal factory prisms are going to give the exact same reflections as the Masillon plaques.

RandyFreeman

05-08-07, 02:35 PM

Hi Mark,

What is the best orientation for the prisms if you are making a VC lens?

Randy

rcgustafson

05-08-07, 03:50 PM

I would like to know if the Crystal Factory prisms are not from the same
manufacturer. Is CF a glass manufacturer or just a distributor.

The CF prisms are made in China. I don't know who else distributes them besides CF. They weigh about a pound more than the Massillon version and have a larger angle to them. Some claim this is a little better for our application, but I have not compared them.

The coatings are applied to the two broad surfaces. There was no reason to coat the edges, which must be blacked out.

Steve--powdered corn starch?

Richard

Mupi

05-08-07, 07:13 PM

Mupi,

You've stated uncoated prisms, but did you block off the ends of the prisms as well?

That will greatly reduce stray light, but the coating just make it that much better...

Mark

I guess the reflections were coming off the main surfaces. So I
just returned them. of course I lost the S&H.

I will wait for the pro lenses to become affordable :-)

CAVX

05-08-07, 07:20 PM

Hi Mark,

What is the best orientation for the prisms if you are making a VC lens?

Randy

Whilst this works, I don't really promote this use, but because I use the same size prisms for both front and rear element with my lens, I can simply turn it around (now becomes a HC) and then lay it on its side (now becomes VC - but have to remove the stand). I have not had any reason to change the angles from their position as a HE lens, as the image looked geometry correct in VC mode.

Some tilt may be needed though...

Mark

CAVX

05-08-07, 07:23 PM

I'm still waiting to hear side-by-side comparisons of the prisms with and without coating.

I can not speak for you guys, but I can confidently state that the coating makes a difference in that it does further control stray light reflections (but may not totally eliminate them) and IMHO, helps as the blacks look deeper...

Mark

klemsaba

05-08-07, 11:51 PM

I have spent some more time with the prisms. Mission Impossible 3 was on Sunday in scope! I haven't seen the HD-DVD version, but the movie looked great on Showtime. I was amazed at the image... usually HD movie channels are a macro-blocking mess or are crop happy.

I didn't notice any reflections except during one scene in the movie, but I can't be sure if it was from the prisms or if that was part of the movie. I didn't think about checking without the prisms in place because I was having too much fun watching the movie!

I can say these new prisms have a better uniform focus than my old Mallison 4x6 prisms. I always had a focus issue on one side of the screen (before I broke them). The new prisms are pretty uniform. As expected, there is a slight defocus between prism/no prism setup, but it is very negligible.

Maybe it is just psychological, but I feel like I have a new projector... and I have 1800+ hours on my lamp! Perhaps the simple fact that I'm no longer zooming my image up 33% to fill the screen is why everything seems clearer.

There is a slight color shift though when using the prisms. Perhaps that is from the AR coating? They are not clear with the AR coating. I haven't done any post prism calibrations or checks.

I'm impressed. I just hope I can build a suitable case to hold the prisms.

CAVX

05-09-07, 01:59 AM

Maybe it is just psychological, but I feel like I have a new projector... and I have 1800+ hours on my lamp! Perhaps the simple fact that I'm no longer zooming my image up 33% to fill the screen is why everything seems clearer.

Too true there. Nothing like full panel rez all the time...

There is a slight color shift though when using the prisms. Perhaps that is from the AR coating? They are not clear with the AR coating. I haven't done any post prism calibrations or checks.

I'm impressed. I just hope I can build a suitable case to hold the prisms.

Off axis, mine look slightly tinted...

Mark

Lindahl

05-10-07, 05:54 PM

Received my prisms, everything looked great, except for the CF boxes, which looked like they ripped apart easily during shipping. Will be a while before I get them set up. Thanks Richard!

Ranger

05-10-07, 08:19 PM

Received my prisms also. Thanks again Richard.

CAVX

05-10-07, 09:22 PM

Is anyone able to post pictures yet?

Mark

klemsaba

05-10-07, 09:54 PM

Since these prisms have the coatings on them what is the best way to clean them? I would hate to rub off the coatings.

CAVX

05-10-07, 10:20 PM

Optic glass cleaner and cloth is said to be the best and most cost effective way...

Mark

klemsaba

05-13-07, 05:22 PM

Here are a few shots.

I have a bow across the top (it doesn't seem as extreme as the photo shows) and the left side isn't vertical. I also don't have even stretch across the screen. Focus is pretty uniform across the screen. I just have the prisms sitting on a table with my projector. I'm sure once I build my case and hang it from the ceiling I can correct some of these issues.

http://members.cox.net/klemsaba/prism2/prismconvergence.jpg

Now for some fun shots where you don't notice any of the problems...

....resized straight from the camera
http://members.cox.net/klemsaba/prism2/prismstarwars.jpg

....resized straight from the camera
http://members.cox.net/klemsaba/prism2/prismclones.jpg

....resized straight from the camera
http://members.cox.net/klemsaba/prism2/prismmi3.jpg

....resized and adjusted levels...
http://members.cox.net/klemsaba/prism2/prismempire.jpg

CAVX

05-14-07, 01:04 AM

WOW very good :)

Mark

MAZMAN808

05-14-07, 05:33 AM

man, those are some nice pictures :)
I cant wait to get mine.

Well done, and thanks for sharing.

RandyFreeman

05-14-07, 11:44 AM

I finally got a chance to try my prisms. I set the prisms on a table in front of my projector. The Crystal Factory prisms have a greater angle than the prisms from Massillon Plaque. Because of this I needed to set the new prisms at less of an angle to the light path. This will make my new housing 1" shorter and 1/2" wider than my old housing. I have a projector that has a recessed lens and the geometry of the new prisms make it easier to get the prisms slightly closer to the lens. Every little bit helps in this situation.

I did this experiment during the day, in a room with lots of light. I was just trying to figure out the angle of the prisms so I can build the housing. I did notice that the coated prisms seem to have reduced the reflections. In fact I didn't see any reflections on the walls. With my uncoated Massillon Plaque prisms, under the same condition, I saw some strong reflections on the walls.

My old housing was fully adjustable. This time I'm going to make a simple housing that isn't adjustable. I'm just going to set the prisms at the angles that I determined during my experiment and I expect the new lens will work perfectly.

Randy

klemsaba

05-15-07, 10:54 AM

I built a prototype case yesterday... I'm not very handy with tools and it shows. I still have everything down off the ceiling on a table as I design and build my final case.

http://members.cox.net/klemsaba/prism2/prismcase.jpg

Jaws is on this weekend on Universal HD. I can't wait to watch my favorite movie with the prisms!

I love this setup! (well not my crappy case design but the potential)

klemsaba

05-15-07, 11:40 AM

Some shots from the HD-DVD King Kong disc. I need to get better at taking screen shots because I did have to do some color correcting this time because my camera didn't white balance properly... but that is close to what I see.

http://members.cox.net/klemsaba/prism2/prismkk1.jpg

http://members.cox.net/klemsaba/prism2/prismkk2.jpg

CAVX

05-15-07, 11:43 AM

Cool :) How did you "scale" the images when using HD DVD as a source?

Mark

klemsaba

05-15-07, 11:48 AM

Cool :) How did you "scale" the images when using HD DVD as a source?

Mark

My Sanyo Z4 scales all resolutions on Component, HDMI, and VGA. Those shots are from my XBOX 360 HD-DVD drive hooked up via VGA.

prabhatb

05-15-07, 06:24 PM

Hi

You might have seen this before: this guy has a nice DIY housing with rail system:

http://www.zuggsoft.com/theater/prism.htm

Thanks

CAVX

05-15-07, 09:17 PM

That is MikeP's set up. He was a real good contributor to the cause at diyaudio where he did heaps to investigate the stray light problems those with non coated prisms were having. His site should be added to the sticky thread for equipment that works with CIH...

Mark

Steve Scherrer

05-15-07, 10:09 PM

klemsaba

05-15-07, 10:17 PM

Has it been established that the coating does a good job on the "stray light problems?"

Based on my experience with both coated and non-coated prisms I would say YES.

CAVX

05-16-07, 01:19 AM

Based on my experience with both coated and non-coated prisms I would say YES.
And I second that :)

Mark

mustang5o

05-16-07, 09:52 AM

My Sanyo Z4 scales all resolutions on Component, HDMI, and VGA. Those shots are from my XBOX 360 HD-DVD drive hooked up via VGA.

Are your sure the Sanyo scales on all inputs and resolutions? From what I read and was told the Z4 only scaled SD material. That information made me pass up a great deal on a used Z4. Don't get me wrong, I love my Panny PT-AX100U (waiting on lens) but it would have been nice to spend half as much money :)

Anyway, nice pics. Can wait to get my lens!

klemsaba

05-16-07, 10:09 AM

Are your sure the Sanyo scales on all inputs and resolutions? From what I read and was told the Z4 only scaled SD material. That information made me pass up a great deal on a used Z4. Don't get me wrong, I love my Panny PT-AX100U (waiting on lens) but it would have been nice to spend half as much money :)

Anyway, nice pics. Can wait to get my lens!

Yep, it scales HD as well. From what understand, your Panasonic is much better than the Z4 anyway. Enjoy your setup! You'll love it when the lens arrives!

Mupi

05-16-07, 06:25 PM

prabhatb

05-17-07, 04:19 AM

prabhatb

05-17-07, 04:26 AM

prabhatb

05-17-07, 12:48 PM

This is a cheap LCD screen protection film - anti-glare: (but may not be useful because of small size)

http://www.pdaextreme.com/product_info.php?products_id=55

JDLIVE

05-17-07, 12:52 PM

Mupi/Randy,

I am considering to try Massilion Plaue prisms in 4set lens configuration. But what I hear about reflection problem I am kinda pausing the thought.

However, if you place the prisms in a housing and mask it around properly (as in http://www.zuggsoft.com/theater/prism.htm) you think you can reduce the reflection issues?

I have the Massilion Plaque prisms in a hosing and don't have major problems with reflections. There are some off to the side and behind my PJ, but I don't notice them when watching films.

I did also have some off to the left that were bothering me because they hit the entrance to my HT room and that hallway is painted white. So I solved that problem by hanging a nice black curtain across the entrance. :cool:

prabhatb

05-17-07, 02:16 PM

JDLIVE,

Thanks for sharing the info.

I am also thinking to get computer monitor anti-glare filter (extras lying at my work) and use it whenever I build MP prism lens. If a piece of such filter can be placed at the entrance of the housing, it may reduce the reflection off the prism towards the projector.

Currently I have a prismasonic H700 lens in a housing and I may try this anti-glare filter, although the prismasonic prisms are AR coated.

Steve Scherrer

05-18-07, 10:01 AM

Anyone has a thought if anti-glare/reflection films can be used on these prisms? You may need to paste this film on one side of each prism.

One such product is 3M™ HF300L Anti-Glare/Radiation Computer Filter. But it is a panel, not a film.

Yes, I tried these. They did not work at all. You have to use these for a system where the film is placed immediately on the display source (like on a monitor screen). Once you put these on the face of the prisms, you completely mess up the image--it's like smearing vaseline on the face of the prisms.

BudBray

05-21-07, 12:46 PM

Mupi/Randy,

I am considering to try Massilion Plaue prisms in 4set lens configuration. But what I hear about reflection problem I am kinda pausing the thought.

However, if you place the prisms in a housing and mask it around properly (as in http://www.zuggsoft.com/theater/prism.htm) you think you can reduce the reflection issues?

I have 4 of those prism and yes, you get wicked reflections...I think I posted on the DIY forum, pictures of the CARS credits....NASTY. Have a set of 4 CF prisms waiting for me at my inlaws in Virginia. Pick em up in July, then I'll post pics of the new VS the old.
Bud

Steve Scherrer

05-22-07, 12:52 PM

klemsaba

05-31-07, 11:46 PM

I built a new case today. Sorry no photos yet. My kids are on vacation with the camera. I thought I would share some ideas...

I'm not very handy with tools and building things (unless it is with LEGOS). I was having a difficult time working with MDF... splitting wood, the dust is horrible, doing multiple cuts, etc.

I went to Lowes today and bought some 1"x10" A-stock pine boards. They were already very close to the proper width I wanted (9 1/2") so all I had to do was cut the other sizes (2- 5 1/4" and 2- 8 1/2") and nail/screw everything together. It really turned out nice. I don't think I'll do the fancy angled cut on the front that others have done. I also bought a 1"x4" board to work on the mounting bracket. The cost was about $15.

I'll post some photos late Saturday or Sunday.

I have to say again that these prisms are great! There is some light loss using the prisms... probably about the same as when i zoomed the image before. But the prisms are way cooler and easier to use than zooming and positioning the image on the screen plus the image doesn't get softer as it does when zooming. The AR coating is amazing. I have yet to see any stray reflections on the screen. Yea, I have some geometry issues at the edges of the screen and a little CA, but you really don't notice those issues when watching a movie.

Later!

Gerry S

06-03-07, 09:22 PM

Richard, did you get the feeling that the optics coating guy had to charge extra up front for lower volume because he had to make a mold or incurred some setup costs? If so, I wonder if he would help out individuals as opposed to dealing in volume at this point.

If not, I wonder if there would be enough interest for another round?

CAVX

06-03-07, 10:03 PM

This thread needs to be moved into the DIY section now...

Mark

adude

06-04-07, 03:07 PM

Well, it appears I am late to this party, but is it too late to get involved in a purchase from Crystal Factory? I keep hearing how these are so much better than the Massillon plaque prisms (and thicker), and wanted to toy with them a bit. How do I get the cheapest price for these prisms (and what is the cheapest price?)

Also, is it too late to get these coated as well?

Steve,

You can call Crystal Factory and order the prisms. They gave us the regular price. The item no you are looking for CWD57 and make sure to tell them "No engravings" on the prisms.

About coating, not sure. Call L&L if they would do the coating for you.

rcgustafson

06-07-07, 01:54 AM

adude is right. It was $60. each for the wedges at CF and that was the normal price. The deal was getting the coating done cheaply at L&L. Richard LaRue at L&L was clear that he did not want to handle individual coatings at a cheap price nor did he wish to deal with the hassle of shipping out individual orders. I suppose he could change his mind, though.

There is no mold involved in the coating process as far as I know. The coating is baked on one prism at a time but certain procedures and tolerances are set up to make it more efficient to do a batch.

The best alternative is to start a new group order or buy coated prisms from CAVX. Be my guest!

By the way, I haven't built my lens housing yet. I just got the new screen installed yesterday. It's a 124"w 2.40 Da-Lite Contour Electrol HP. Looks great with my RS-1!

Richard

allensbad

06-07-07, 02:58 PM

Well I'm up for starting a new group order, anyone else?

BTW does anyone know what happened with the French guys, I can't find any reference of the posts here on AVS. I recall they may be taking orders for a second group buy in July or something like that?

I found the web site but given I don't speak french it doesn't really work for me...

oman321

06-07-07, 04:11 PM

BTW does anyone know what happened with the French guys, I can't find any reference of the posts here on AVS. I recall they may be taking orders for a second group buy in July or something like that?

I fount the web site but given I don't speak french it doesn't really work for me...

That thread was removed due to it being considered an unathorized power buy. As I understood it, there wasn't enough interest for an additional group order so instead additional units were purchased with some being taken by some late comers but at the time there should have been about 7 pairs available. Put a message on the site you found in english and I believe they will respond to you. Good luck.

allensbad

06-07-07, 11:08 PM

oman321,
thanks for the info, I'll see if they have any more.

jplmain

06-08-07, 04:54 AM

allensbad

06-08-07, 02:56 PM

There were only 50 for the one batch I was third to last. You had to pay up front to receive spot on the list which is kind of risky. All will start in to receive them in mid July I hope :o . I don't think they have enough interest to start another 50. I notice they have 51 in line so, some might have second thoughts and you may take some ones place.

I can't figure out how to register in their forum so I can't speak to them my self. I sent email and get no reply. I just have to wait till July :confused:

Thats cool, I guess I have nothing to loose asking if they have extras.
If not then maybe we can start a new run here with CF and L&L.

I was able to register on the site, it's the same as most other forums so I just filled out the form as best I could. It was excepted. and few seconds later I got a email to complete the registration.
I think it was
Username
Password
email
email
do you accept rules
combo box to match the image
submit button was on the left

reconlabtech

06-08-07, 03:14 PM

Thats cool, I guess I have nothing to loose asking if they have extras.
If not then maybe we can start a new run here with CF and L&L.

I was able to register on the site, it's the same as most other forums so I just filled out the form as best I could. It was excepted. and few seconds later I got a email to complete the registration.
I think it was
Username
Password
email
email
do you accept rules
combo box to match the image
submit button was on the left

Would viewing the page through the Google translator help?

allensbad

06-08-07, 03:25 PM

I guess the french guys didn't appreciate my post in English and it was removed from the forum.

It makes sense they wouldn't want people posting messages in languages other then French, I'm sure AVS would do the same thing.

But Hey, it was worth a try...

snowkirk

06-08-07, 08:27 PM

Allensbad,
I was in the 3rd batch but since he didnt get sufficient numbers, skhattane added a few more prisms to the second batch. Send him a PM and check if he has any more left

Snowkirk

allensbad

06-08-07, 11:38 PM

Allensbad,
I was in the 3rd batch but since he didnt get sufficient numbers, skhattane added a few more prisms to the second batch. Send him a PM and check if he has any more left

Snowkirk

Snowkirk,
thanks for the tip, I'll do just that.

Allen

allensbad

06-09-07, 11:50 AM

FYI
I got a email from skhattan (Sam) and they do not have any extras and will not be ordering again.

Always a day late....

Mupi

06-18-07, 08:56 PM

That thread was removed due to it being considered an unathorized power buy. As I understood it, there wasn't enough interest for an additional group order so instead additional units were purchased with some being taken by some late comers but at the time there should have been about 7 pairs available. Put a message on the site you found in english and I believe they will respond to you. Good luck.

hmmm... I wonder in what way this thread is an authorized power buy.

AVS figured that out after so many of us sent our payment. It would have been
helpful if we were warned before we put down our money.

Anyway... I will not be setting up my CIH. So if I get my set of prisms
I am going to sell them. I paid for it combining with another AVS member and
my friend. So my prisms may not be packed separately.

I will post when I get them. I hope it is not illegal to put that kind of sale post. Since I bought them through this forum I guess I should be allowed to sell them here. In case I am not allowed, of course I will put it on ebay or videogon.
So watch for it then. I hope this post will not be deleted.

In future it would be a good idea not to allow any such group buys at all
unless a pro manufacturer gets prior permission from AVS and the power
buy is posted by AVS.

CAVX

06-19-07, 08:21 AM

hmmm... I wonder in what way this thread is an authorized power buy.

It's not or it would have been listed as a sticky for the duration of the buy...

Mark

oman321

06-19-07, 09:19 AM

Since I bought them through this forum I guess I should be allowed to sell them here. In case I am not allowed, of course I will put it on ebay or videogon.
So watch for it then. I hope this post will not be deleted.

In future it would be a good idea not to allow any such group buys at all
unless a pro manufacturer gets prior permission from AVS and the power
buy is posted by AVS.

This is exactly why it was deleted. It was not authorized by AVS and you did not buy the prisms through this forum. You bought them from skhattane through paypal. AVS had nothing to do with it and if they were giving it the thumbs up they would provide the thread and link. If something goes wrong people try to hold AVS accountable for something they had no part in.

I believe their is a member to member forum here where you can list your item for sale.

Sorry for hijacking guys.

Mupi

06-19-07, 07:54 PM

and why is this thread not deleted yet. This is not an AVS authorized buy either.

if AVS had not allowed this kind of threads in the first place no one would have
bought it. Sam did not make a private announcement. He posted in this forum and
that is how people came to know about it. AVS is not responsible but they should
be more vigilant and try to stop such threads as soon as they are posted instead of
doing it after some 50 people paid the money. Now it is hard to communicate regarding that
buy.

Just deleting a thread after so many people had committed to the buy is not fair.

I guess AVS should get that thread back untill people get their prisms. The mods
reply as soon as they find any "where to buy" posts. Why did it take so long
for them to realize that it was not authorized and why is this thread still here.

Mupi

06-19-07, 07:55 PM

It's not or it would have been listed as a sticky for the duration of the buy...

Mark

then why is this thread not deleted?

Nedtsc

06-19-07, 08:07 PM

CAVX

06-20-07, 04:28 AM

Mupi, use Bable Fish to talk to the French guys to find your prisms. It is fairly accurate, though does come up with some comical mistakes. I am the guy that posted photos of "the destructibles". It was supposed to translate the word to "the incredibles"...

Mark

rcgustafson

06-26-07, 10:30 PM

then why is this thread not deleted?

Mupi,

I guess the French buy morphed into something substantially beyond the scope of this thread. Maybe the website sign-in and Paypal aspects were too commercial.

This thread was started as a diy deal in which I referred other avs members to two sellers (CF and L&L) in which I have no material interest and the coating thing was set up as a one-time, ad hoc arrangement. I see a difference.

No one in their right mind would perceive AVS as responsible in any way for the results.

I think a little diy group organizing should be tolerated. It builds community and contributes to the overall experience of participation on avs. Direct solicitations from sellers are not, however, in the same category.

Richard

adude

06-29-07, 02:46 AM

HoMac

07-04-07, 12:34 AM

I bought a pair of prisms from Crystal Factory and shipped to LL Optical Service (Richard Larue) for coating over a month ago. Richard gave me a discount if I could wait 2 weeks. He is missing over 2 weeks. I called almost every day and left messages after messages. The company don't even bother to call me back. Don't know how to get my prisms back. Is www.llopt.com reliable?

CAVX

07-04-07, 01:00 AM

I'd say so. The others reported very positive comments. You have to consider they might have a large work load on right now, so your job had been cued...

Mark

HoMac

07-05-07, 08:56 PM

What worries me is I emailed, called and left messages almost everyday for over two weeks, but no response from him or the company. Richard seems like a nice guy. I have no idea what's happened to him.

CAVX

07-06-07, 10:53 AM

Holidays?

Mark

GetGray

07-06-07, 11:38 AM

Marks is right, a lot of factory type companies shutdown for the 4th weekend and some for 2 weeks. I'd say that's a good possibility.

Mupi

07-06-07, 10:34 PM

Mupi,
Though your experience is unfortunate, I agree with Richard totally. We participated in the "Coating" deal with fully awareness that it is not AVS sponsored. The forum is a place to share ideas and have fun with doing these things. There are lots of reviews of the equipments on this site on which many users base their purchases. Now it won't be appropriate to hold AVS responsible if something goes wrong with that equipment.
About the powerbuy, AVS cannot be hold liable for the purchasing experience. Go through the AVS disclaimer at the end of powerbuy sticky and you will know.

Hope you are able to sell the prisms and put this bad experience behind soon.
A Dude.

well I didnt say that AVS is liable for anything.

It shouldnt have taken that long for AVS to figure out that the thread was
commercial and then when some 50 guys had committed to the
buy they just deleted the thread. Now we have to try to communicate
using some frech translating software!

Anyway...I hope we all get our prisms.

BTW in what way is CAVX's advertising different from what Sam did.
Isnt CAVX's advertising commercial?. It is not sponsored by AVS but
he has a link to his web site which sells the prisms. That is not
sponsored by AVS. Different rules for different people?

HoMac

07-08-07, 10:45 AM

Richard (LL Optical) contacted me after the Fourth. The company was busy, unorganized and in the process of moving. Hope they have the time to coat mine soon.

CAVX

07-09-07, 04:04 AM

BTW in what way is CAVX's advertising different from what Sam did.
Isnt CAVX's advertising commercial?. It is not sponsored by AVS but
he has a link to his web site which sells the prisms. That is not
sponsored by AVS. Different rules for different people?

Are you refering to THIS LINK (http://cavx.blogspot.com/2006/11/marks-home-theatre-projects-cih.html)?

If so, the link is a part of my website and is about CIH in general. Yes it does features links to all to the sites of other manufactures of anamorphic products including ISCO, Panamorph and Prismasonic, not just my own.

Whilst you're free to disagree, I don't think including a link is the same as starting a thread on it...

Mark

Gerry S

07-09-07, 08:07 PM

Mupi

07-09-07, 08:24 PM

From my observations, Mark is definitely an asset here, and always seems eager to help. He never comes across as trying to sell anything.

His link contains one of the better explanations of CIH for the layman, and it is a must read for anyone getting acquainted with this technology.

well it also sells his DIY prism. So that is commercial. If the information
is an asset just leave the information and get rid of the
advertisement about selling the prisms. Just because someone is an
asset it doesnt mean that he or she can use this forum to sell their
product, unless there are double standards i.e if the mods have allowed
him.

If that is allowed then anyone can give a link to a web site that
sells their product. In otherwords Sam could have just posted a
link to a web site from where we could have bought the prisms.
That is no way different from posting a thread about a group buy.

Basically no one should be allowed to use this forum as an avenue to
sell their product, whether they post a thread or include a link in their
web site which sells their product.

GetGray

07-09-07, 08:30 PM

This was interesting at first. That has passed. Unsubbing...

Mupi

07-09-07, 08:30 PM

Are you refering to THIS LINK (http://cavx.blogspot.com/2006/11/marks-home-theatre-projects-cih.html)?

If so, the link is a part of my website and is about CIH in general. Yes it does features links to all to the sites of other manufactures of anamorphic products including ISCO, Panamorph and Prismasonic, not just my own.

Whilst you're free to disagree, I don't think including a link is the same as starting a thread on it...

Mark

well both ways one is selling his or her product which is not sponsored
by AVS. So either way it is illegal.

If the information in your web site is valuable then just leave the
information and delete the commercial portion or create a
separate web site for the information and incude that link alone.

Is AVS sponsoring the manufacturing/selling of your prisms or
Are you sponsoring AVS forum in any means financially?

If not, then you cant use this forum as an avenue
to sell your stuff unless the mods have set double standards.

Mupi

07-09-07, 08:38 PM

This was interesting at first. That has passed. Unsubbing...

I have made my point very clear.

Let the mods decide whether this thread is in any way legal compared to
Sams thread and let them decide if it is ok to include a link in the
signature which points to a site that sells someone's product which is
not authorised by AVS.

Gerry S

07-09-07, 08:54 PM

I totally disagree. The page has links to Runco, Isco, Prismasonic, and Panamorph. It also has a link to Aussiemorphic.

If the link was meant to market his product, why would he include links to competing products? Why isn't he bashing competitors products? The spirit of the page is educational. It would be just as easy for me to buy a Panamorph lens from that page.

Bottom line, he has explained CIH in an easy to understand way, and detailed all the options one has when choosing a lens.

klemsaba

07-09-07, 09:02 PM

I finally have my prisms up on the ceiling! Has anyone built their cases yet or tried out the prisms? My setup is pretty bad looking but it is still a work in progress. I'm already planning my new box for the prisms. It doesn't look as bad as the photos because of the flash. My room is pretty dark even with the lights on.

These prisms are great! My wife is even excited that she doesn't have to do the zoom thing to make the movie fit the screen!

I don't have a shot, but my brother-in-law came over when I had my theater tore up and he wanted to see Black Hawk Down on Blu-Ray. So I did the zoom thing and went to the shot included in this post. Guess what? The detail wasn't as good as it was with the lens in place! It wasn't 'night and day' different, but the lens does help with PQ compared to zooming.

Here are some photos...

http://members.cox.net/klemsaba/prism3/prism1.jpg

http://members.cox.net/klemsaba/prism3/prism2.jpg

http://members.cox.net/klemsaba/prism3/prism3.jpg

http://members.cox.net/klemsaba/prism3/bhd2.jpg

I need to do some calibrations now...

CAVX

07-09-07, 09:16 PM

Check that clarity to the corners. Awesome stuff, good work...

Mark :)

GetGray

07-09-07, 09:46 PM

I forgot to hit unsub :). Good. Just got interesting again. Nice craftsmanship on your mount kimsaba.

GetGray

07-09-07, 09:53 PM

The page has links to Runco, Isco, Prismasonic, and Panamorph. It also has a link to Aussiemorphic. Agree with Gerry. I guess if I was extreme and particularly anal about the "to the letter of the rules", in some way Marks site could be deemed as a commercial site that was a competitor to my CineSlide (oops, plug ;)). But I think that's a stretch to say the least. He even has a photos of my Isco lens transport there, too (albeit an old one ;)). I have no problem with it. It's not a marketing website in my opinion. Hell, I may link his from mine :eek: :D. Nuff said, back to the cool photos and crafty installs...

rcgustafson

07-09-07, 10:46 PM

Nice job, kimosabe...I mean, Klemsaba. I think it looks great. I feel like a proud godfather of your lens.

While the feeling lasts, I might make an offer that can't be refused to...oh, never mind.

klemsaba

07-09-07, 11:55 PM

Thanks guys.

I need to lower the box down about another inch because the light path hits the bottom of the case. I compensated by tilting the projector up and shifting the image down just so I missed the bottom. Unfortunately this cause some skewing of the normal 16x9 image so I adjusted the keystone to get it right. If I can eliminate the keystone adjustment I'm sure the image will look even better. I suppose that is why so many people cut an angle from the front of the box?

I have another board that I'm thinking about attaching to the top of the box and then attaching the rails to that. This will then hide all the hardware. The only problem is the prisms already weigh a ton and I really don't want much more weight up there. When I build my new box I may just paint everything black and call it good.

I have some bowing that is obvious with test patterns but I don't watch test patterns.

Come on guys! Let's see some progress from all those lenses that got coated! :)

CAVX

07-10-07, 03:10 AM

Klemsaba,

It looks like you have the lens mounted directly to the slides. It also appears that you have (or had) a mounting point on the sides. If you were to add a stand, maybe you could tilt the lens. This would solve 2 problems -

1. the vignetting you've described and
2. the pincushion issue may reduce by making the bow symmetrical all around the image, not just on one egde.

Mark

Gerry S

07-10-07, 08:07 AM

...
Come on guys! Let's see some progress from all those lenses that got coated! :)

I second that! I'm trying to decide whether I need to visit Crystal Palace on my next trip to Cali, or just bite the bullet and consider my other options. Regretfully I haven't heard enough from those who chose this path.

phoveo

07-29-07, 12:03 AM

Hi Guys -

I was part of the original Powerbuy on these. We FINALLY set up the lens tonight, and the image was HUGE and GREAT!!

However, we were getting reflections out the wazoo... Basically, when there was a white or bright color on the screen, that part of the image would be duplicated to the center of the frame...

Seeing how these lenses have the anti-reflective coating, I was a little disappointed with the reflection performance...

We're using an Infocus 4805 and a homemade enclosure, made of wood and painted matte black. The lens is zoomed out to have the largest image as possible, the prism setup is at most an inch away from the lens.

Does anyone have advice on reducing reflections? Does it help to put black felt on the ends of the lenses?

Thanks very much in advance.

- Keith

klemsaba

07-29-07, 12:22 AM

However, we were getting reflections out the wazoo... Basically, when there was a white or bright color on the screen, that part of the image would be duplicated to the center of the frame...

Seeing how these lenses have the anti-reflective coating, I was a little disappointed with the reflection performance...

Does anyone have advice on reducing reflections? Does it help to put black felt on the ends of the lenses?

Thanks very much in advance.

- Keith

I just put black electrical tape on the ends. You might try reversing the prisms. I had reflection problems when I first arranged my prisms. I did some rearranging of the prisms and everything is good now. Here is a quick sketch of how my quick setup looks...

http://members.cox.net/klemsaba/prism/prismsketch.jpg

I bet your prisms are reversed from my sketch. Now that I have the housing built and mounted, I don't see reflections anymore.

phoveo

07-29-07, 12:49 AM

klemsaba -

Thanks for the sketch and the advice. I have a feeling we had things reversed... I will buy some tape and check the setup in the morn...

Thanks again!

-- Keith

CAVX

07-29-07, 02:33 AM

We're using an Infocus 4805 and a homemade enclosure, made of wood and painted matte black. The lens is zoomed out to have the largest image as possible, the prism setup is at most an inch away from the lens.

Does anyone have advice on reducing reflections? Does it help to put black felt on the ends of the lenses?

Yes there are a few things you can do -

1. Blocking off the ends will help.
2. Reduce the image size to increase the TR and can help also.
3. Try sliding the lens either to the left or the right. When you use heaps of zoom, sometimes light leaks around the prisms causing a nasty on screen effect, and non reflective coatings can not fix this.
4. move the adaptor closer to the projector. 1 inch is like 25mm, and you really want to be at about 1/2" or 12mm or closer if you can...

I certainly have no regrets by replacing my non coated prisms with the newer coated ones.

Mark

phoveo

07-29-07, 09:36 AM

Thank, Mark!

I will try the new arrangement,. block of the ends, reduce the image size - a little -, and try to move the lens setup closer to the projector.

Thanks again.

-- Keith

CAVX

07-29-07, 09:41 AM

I know people want the largest screen size possible, so rather than just reduce the image height through zoom, can you move the projector back any? That way you might be able to keep the same size screen you have now...

Mark

phoveo

07-29-07, 11:01 AM

Unfortunately,. we are at the mercy of NYC real estate, so, we can't move the projector back any further. Unless - we get the neighbor's permission and break a hole in the wall. Hmm....

phoveo

07-29-07, 04:46 PM

Reflections are GONE - even at the widest setting!

Thanks again!

Oops! - What is that crashing sound from the living room...? I''ll be right back...

-- Keith

klemsaba

07-29-07, 07:26 PM

That's great news! Have fun! I love my setup...except my box looks ugly. Oh well, it's the image that matters!

Do you have any photos of your setup?

phoveo

07-30-07, 12:37 AM

I just broke in the new setup with GLADIATOR. Um yeah!

Brights and darks looked fantastic, however, it seemed that darkish-midtones were slightly crushed. Specifically, the "shadow" sides of faces. Something I normally wouldn't notice, just being critical upon first viewing. Time to buy a calibration DVD...

I took some photos tonight, and will try to post them soon.

-- Keith

CAVX

07-30-07, 09:01 AM

So how are you guys setting the prisms for correct geometry? I just re-did my set up and found that my projector was slightly off centre axis :o but after a short time, had it back in line. I also finally mounted the Perspex plate with sprung loaded bolts for easy tilt adjustment. Looks way better now - damn, that means I have re shoot all my site screen shots again...

Mark

phoveo

07-31-07, 04:21 PM

Hi Mark -

Correct geometry? Heh heh. I downloaded the Test Pattern that you have generously posted on your website, made an hour long movie out of it, and projected it. We then made adjustments based on the projected image by measuring the various circles with a yard stick...

I must add - we have a very bare bones setup. We are projecting on a off-white wall, the projector is hanging from a cheap ebay ceiling mount, and we are using my old stereo for sound.

However - it's good enough for me!

Thanks.

-- Keith

CAVX

07-31-07, 05:18 PM

OK :)

I spend a few hours on the week end redoing mine. Basically started with the 16:9 image centred perfectly in the middle of the screen (side masking would come in real handy here), which involved me actually shifting the whole EQ rack slightly to the left, then added the prisms and made careful adjustments of the expanded light to the screen edges. I then had to check that the image did not shift horizontally (or vertically) when I removed the lens. Fiddly, but well worth it...

Mark

Gerry S

08-03-07, 11:28 AM

I am curious to know if the Anti-Reflective coating diminishes brightness?

phoveo

08-03-07, 04:10 PM

Hi Guys -

Just a quick calibration question. I don't have a calibration DVD yet, but am having some folks over tomorrow to show off the new setup.

I'm using an Infocus 4805 / Bravo D1 and the Anti-reflective Golf Trophy Specials. I am shooting from 16 feet away onto a beige wall. The 2:35 projected image is 11 feetish wide, 4 1/2 feetish high - BIG! I'm using high-power mode. It looks AWESOME.

However... I'm noticing that darkish mid-tones - namely the "shadowy" part of peoples faces - are a little darker than the should be.

The Question: Is it just as simple as raising the brightness?

If anyone has any suggestions, I'd be awfully obliged!

-- Keith

CAVX

08-03-07, 08:20 PM

I am curious to know if the Anti-Reflective coating diminishes brightness?
No, they actually improve black levels by minimising the stray light that can reflect onto the screen...

However... I'm noticing that darkish mid-tones - namely the "shadowy" part of peoples faces - are a little darker than the should be.

The Question: Is it just as simple as raising the brightness?

If anyone has any suggestions, I'd be awfully obliged!

-- Keith
The colour discrepancy is due to the fact that your projecting on to a Beige wall, not a white screen.

Everything we see is based on reflected light is is made up of varing amounts of RGB. If something in the system causes colour change (like a beige wall), it will affect everything you see, not just skin tones...

1. You NEED to get a white panel at the very least - maybe that plastic called do-able you guys have over their for around $10.
2. you NEED to get a calibration disc. It is impossible to get correct user controls settings based on actual video as there is simply too many variables in program material. Reference Test Patterns are so called because they give you a REFERENCE to work off. Even the free THX optimiser on some DVDs (don't use CARS) is better then not having any test material - that is why THX included it.

Upping the brightness will only decrease the black levels you have now, thus give the image a washed out or even smoky look...

Mark

GetGray

08-03-07, 08:26 PM

If anyone has any suggestions, I'd be awfully obliged!

-- KeithSee my sig for calibration DVD, or get Avia or Digital Video Essentials.

CAVX

08-03-07, 08:29 PM

Hi GetGray,

OT, but what filters are you using for your calibration DVD?

Mark

GetGray

08-03-07, 08:37 PM

The appendix of the "manual" has a bunch of details about that question. Where to get them, part no's, recommendations, etc. Personally I prefer the "free" THX glasses. They use a Lee brand blue filter and if you have a theatrical supply house near you, you can usually get filter sample books for free. The full sheets (big enough to wrap around your head) aren't very expensive if they don't have the sample books. Same exact filter material. Manual's appendix has the filter code/part number (I forget or I'd say here). Kodak deep blue seperation filters are listed there for the purists. Edmunds has those at avout $50 a pop. For contributors who insist, I make the Lee filters available. Avia and DVE also sell replacement filters which work, too.

CAVX

08-03-07, 09:20 PM

The blue filter values were published on Joe Kane's site a while back. When I shopped around here, no-one could supply that value of "colour correction" filter, but they did lead me to finding gel pads of the right value that you can actually sit in the light path of the projector.

I'm with you, THX optimiser glasses (I have a few pairs now) are free when you purchase anything from the on line store at THX.com, so well worth the price of a mouse pad or coffee cup :)

My only concern was were they the correct value or specific to the colour test pattern of the Optimizer (which is off BTW)? I did try them with JPK DVE and they seemed ok...

Mark

phoveo

08-04-07, 01:31 AM

- White screen - will do...
- Calibration disk - will do...

Hangs head in shame...

thanks guys,

- Keith

CAVX

08-04-07, 04:00 AM

- White screen - will do...

I would also be looking at a thick black boarder to give your image that nice sharp edges look...

- Calibration disk - will do...

I have not GetGrays disc yet but will soon. To get the filters, go to the THX (http://www.thx.com/home/dvd/blueGlasses.html) online store...

Hangs head in shame...

thanks guys,

- Keith

No need for that, we're all still learning...

Mark :)

phoveo

08-05-07, 01:21 PM

Well - I just popped over to the DIY Screen forum, and, I will see you guys in a few months...

Thanks!

-- Keith

CAVX

08-05-07, 06:40 PM

There is a bit of reading over there :)

Mark

sknyfs

08-06-07, 03:49 PM

I also finally mounted the Perspex plate with sprung loaded bolts for easy tilt adjustment.
Mark

Mark, where did you find those. I might check HD on the way home today. I need to do something with my setup (got it from you) I finally mounted the PJ and Sled and Lens. I was about to screw the frame to get the proper tilt until I saw that statement. Thanks for saving your .. I meam my Lens frame from sure destruction.

-- Russell

CAVX

08-06-07, 09:50 PM

sknyfs

08-06-07, 10:21 PM

Russell,

I sourced the Perspex from the same plastics guy that made the original water prisms for me back in 2005. It is just a 360mm square plate that I attached to the base of the projector using the 4 M5 bolts on the bottom on the unit.

I lined the plate centre to the main MDF board, drilled holes right through and then used springs to space the perspex away from the MDF. The springs compress to allow precise adjustment. I didn't include the Perspex with the sled as there was too many variables with different makes and model projectors.

Take a look at the image to see how I did mine...

Mark

I already have build something and used wing nuts similiar to what you have to mount my projector ( I have 4 - 5 inch screws sticking out for adjustment). I thought you where refering to the nuts/screw used for the lens tilt. It seems that whatever I do, no matter how tight I make the 2 outside screws the lens always seems to move.

CAVX

08-07-07, 12:20 AM

It seems that whatever I do, no matter how tight I make the 2 outside screws the lens always seems to move.

There is a fair amount of weight there, but I not had any problems with lens tilt in the past...

Mark

sknyfs

08-07-07, 10:56 AM

There is a fair amount of weight there, but I not had any problems with lens tilt in the past...

Mark

What's the size of those 2 screws. I hate metric. :D

CAVX

08-07-07, 06:48 PM

They're actually imperial - 3/16" x 1.5". I used imperial as I knew it would be easier to find than say an M5 bolt. If they're not tightening up, the tee nuts may have striped out from the MDF...

Mark

Gerry S

10-01-07, 10:01 AM

After seeing how small those french prisms are, I was wondering if you could get by with the Crystal Factory CWD46 lenses (4" x 6") as opposed to the 5"x7" ones everyone in this thread ordered.

If you could do it over would you use the smaller ones? Would the smaller ones still work? Thanks.

adude

11-27-07, 11:18 AM

I finally put together the case and the slide mount for these lenses. Put the prisms in the projector light path and tested with the anamorphic HCFR image. I am noticing very bad chroma aberration only on the right side. On the left side, its way way lower. Just to give the idea about prism placement, this is the view from the top. The projector and lens is ceiling mounted.

Also, one thing that I notice, each lens is expanding only on one side and have very little effect on the another. Is this how its supposed to mean?

Steve Scherrer

11-27-07, 10:34 PM

Also, one thing that I notice, each lens is expanding only on one side and have very little effect on the another. Is this how its supposed to mean?

That is my experience as well. Each prism expands half of the image.

The CA on the side can be remedied using masking.

adude

11-27-07, 10:42 PM

Well, the right 25% side of the screen is badly affected by the CA. If I can somehow make the CA uniform, by reducing it on the right side and increase on the left.

Any ideas? some position change in the prisms?

adude

12-08-07, 04:37 PM

Okay, I played around the distance between two prism and noticed that one prism was tilted little bit in other direction as well. I made it straight and CA on both sides became uniform.

Also, one thing to remember. The picture on the screen without the lens should be exact square. Any distortion in the shape will be magnified by the anamorphic lens.

Now back to enjoying movies.

A. Dude