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post #451 of 2010 Old 04-30-2009, 07:25 PM
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Ok, so when are there going to be 2.35 shaped panels from TI ??
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post #452 of 2010 Old 04-30-2009, 07:57 PM
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Originally Posted by mark haflich View Post

But its the same thing as the Snomatte? Not on Stewart's web page yet. Better have dark walls and floors and ceilings.


It is listed under materials. Snowmatte is gone. I'm told, although not sure how accurate the info is, that the 1.0 was reformulated, and given the Studio Tek designation.

http://www.stewartfilmscreen.com/res...sidential.html

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post #453 of 2010 Old 04-30-2009, 08:00 PM
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Quote:
Originally Posted by Health Nut View Post

Ok, so when are there going to be 2.35 shaped panels from TI ??

Then we can buy lenses for 16:9 content.

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post #454 of 2010 Old 04-30-2009, 08:23 PM
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Quote:
Originally Posted by coldmachine View Post

Ash, Its not possible that a correctly installed and adjusted ISCOIII can have that effect. There is certainly an issue there. Do you have any light spill by any chance?

As for your reading of 450, is that "in room", or is that the PJs max value?

Those are all in room. That is the real ANSI of his system.
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post #455 of 2010 Old 04-30-2009, 09:29 PM
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Quote:
Originally Posted by Health Nut View Post

I remember when the Sony VPW-100 came out a few years back, the first with the dynamic iris... we all claimed how brightness compression would be significantly reduced with a much brighter bulb.

I'm not sure why anybody would claim that. Unless people figured that with a brighter bulb they could start the iris more closed for higher native/static on/off CR.
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Originally Posted by Health Nut View Post

I don't see why anyone would ever set the manual iris to the closed position...

It might give higher native/static on/off CR and even if not, a person might want less ft-lamberts. When I saw the Lumis at Alan's place I liked it a lot more with a strong neutral density filter. Before that it was super bright (it was a small image) and really brought out the artifacts and screen texture to my eyes. Even on the lowest bulb setting it was still super bright before the ISCO 3 and ND filter were added.

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post #456 of 2010 Old 04-30-2009, 11:31 PM
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Quote:
Originally Posted by umr View Post

Those are all in room. That is the real ANSI of his system.

Thanks. That was the point I was making to Ash. His unit will still be a typical 1000 ANSI unit.

An in room response of 450 is indicative of the room itself. We all know that many people install high ANSI units in rooms that will only return 100 or so.

450 isn't a low number, and to get significantly better requires effort.

Also, I suspect there may be some light spill if putting the lens in place is halfing ANSI. If the slightest bit of light, even very low level, hits anything other than glass, all bets are off. Do you know if the unit has been tested for this?

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post #457 of 2010 Old 05-01-2009, 12:12 AM
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Quote:
Originally Posted by darinp2 View Post

... When I saw the Lumis at Alan's place I liked it a lot more with a strong neutral density filter. Before that it was super bright (it was a small image) and really brought out the artifacts and screen texture to my eyes. Even on the lowest bulb setting it was still super bright before the ISCO 3 and ND filter were added.

--Darin


That just reinforces that I did the right thing by going to the matte 1.0 screen... it is 11.5' wide 2.35... I plan on keeping the manual iris off, bulb setting to lowest...

Time to switch to matte screens, which is a good thing... unless of course you are running 14' screens... I suppose the HT 6000 dual bulb, dynamic iris model will be coming out next for those in that situation...
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post #458 of 2010 Old 05-01-2009, 04:09 AM
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Quote:
Originally Posted by coldmachine View Post

Thanks. That was the point I was making to Ash. His unit will still be a typical 1000 ANSI unit.

An in room response of 450 is indicative of the room itself. We all know that many people install high ANSI units in rooms that will only return 100 or so.

450 isn't a low number, and to get significantly better requires effort.

Also, I suspect there may be some light spill if putting the lens in place is halfing ANSI. If the slightest bit of light, even very low level, hits anything other than glass, all bets are off. Do you know if the unit has been tested for this?

Does the Lumis chassis allow for very close placement?

What is the known impact of 'in room' ANSI? The fact that it is getting halved in Ash's room seems against everything I've read about the ISCO. I would imagine with Ash's install, there is likely no light spill as his install was expertly done... So, if not, what would explain those numbers??

There are more than a handful of [op amps] that sound so good that most designers want to be using them as opposed to discreet transistors. Dave Reich, Theta 2009
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post #459 of 2010 Old 05-01-2009, 04:58 AM
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I also added a port glass in my port hole.... wonder what my ANSI would be without this.
Ash.
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post #460 of 2010 Old 05-01-2009, 05:41 AM
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Quote:
Originally Posted by Ash Sharma View Post

I also added a port glass in my port hole.... wonder what my ANSI would be without this.
Ash.

Hmm...

But the projectpr beam is moving through that port glass with the ISCO in place and out of the light parth... SO, if the port glass were the case, you'd think both numbers would be low...

Light spill, as CM theorized, may be the issue...???

I'm sure someone here will sleuth it out..

There are more than a handful of [op amps] that sound so good that most designers want to be using them as opposed to discreet transistors. Dave Reich, Theta 2009
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post #461 of 2010 Old 05-01-2009, 05:51 AM
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Quote:
Originally Posted by thebland View Post

Does the Lumis chassis allow for very close placement?

What is the known impact of 'in room' ANSI? The fact that it is getting halved in Ash's room seems against everything I've read about the ISCO. I would imagine with Ash's install, there is likely no light spill as his install was expertly done... So, if not, what would explain those numbers??

"in room" ANSI is the limitation placed by the room, rather than the number achieved in a blackout tunnel.

Light spill, as I meant it in this case, has nothing to do with the install. I was referring to the PJs light spill, if any is present. It can easily be seen by projecting onto a light surface and looking for light outside of the image. It mainly takes the form of a ring, or parts of a ring. Sometimes its quite faint, so it may take a few seconds to see it in a dark room. If any of this light is hitting the mount and being reflected back into the lens then ANSI will be much lower than with the lens out.

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post #462 of 2010 Old 05-01-2009, 05:52 AM
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Quote:
Originally Posted by Ash Sharma View Post

I also added a port glass in my port hole.... wonder what my ANSI would be without this.
Ash.

Unless its a really good glass, this will almost certainly trash your ANSI number.

Id certainly try it without. Ive never used glass in a port hole for this reason.

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post #463 of 2010 Old 05-01-2009, 05:56 AM
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Exactly and look at what the movie theaters use for this....
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post #464 of 2010 Old 05-01-2009, 06:22 AM
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It is a Edmunds glass... . very High Quality.
I will check the light spill issue...
Thanks.
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post #465 of 2010 Old 05-01-2009, 08:59 AM
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post #466 of 2010 Old 05-01-2009, 09:00 AM
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Quote:
Originally Posted by Ash Sharma View Post

It is a Edmunds glass... . very High Quality.
I will check the light spill issue...
Thanks.

Can you try without the glass?

Assuming that the glass good enough, I would ask the following..

1. Is it totally clean and dust free?

2. Is there any way to adjust the angle of the glass, to avoid any possible reflective issues.

As I said before, an "in room" max of 450 is more likely indicative of the room rather than the PJ. Its also significantly higher than the majority of rooms will yield.

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post #467 of 2010 Old 05-01-2009, 09:25 AM
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Ash

Is the port glass angled or straight? Are you seeing any light on the insides of the Isco3 or just through the glass? You can take a clear sheet of white paper and run it between the lens and the pro to see how large the light beam for the projected image is hitting before and after it leaves the isco. Too large and you may have issues...
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post #468 of 2010 Old 05-01-2009, 09:48 AM
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Ok... I will spill the beans a bit ..... My lumis has a issue with the Lumis Rod Integrator which has a faulty design.... This causes shadows at the left and right edge of the screen. You see these shadows in very bright images such as clear blue sky. Sim says that this issue is occuring only in very bright projectors such as mine.
Sim has a fix for this and I understand the rod integrator design has been changed to correct this but since my projector is a early piece it will go in for replacement of the Rod Integrator later this month.
I am not sure if this is causing the light spill and reduced ANSI.
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post #469 of 2010 Old 05-01-2009, 09:49 AM
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The Glass is clean (actually hard to keep it spotless due to dust particles) and is installed correctly at an angle.
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post #470 of 2010 Old 05-01-2009, 11:36 AM
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Quote:
Originally Posted by Ash Sharma View Post

Ok... I will spill the beans a bit ..... My lumis has a issue with the Lumis Rod Integrator which has a faulty design.... This causes shadows at the left and right edge of the screen. You see these shadows in very bright images such as clear blue sky. Sim says that this issue is occuring only in very bright projectors such as mine.
Sim has a fix for this and I understand the rod integrator design has been changed to correct this but since my projector is a early piece it will go in for replacement of the Rod Integrator later this month.
I am not sure if this is causing the light spill and reduced ANSI.

On your 12' ft screen, how large are the shadows?? 1 ft? 2 ft? 6"?

Thanks, Ash.

There are more than a handful of [op amps] that sound so good that most designers want to be using them as opposed to discreet transistors. Dave Reich, Theta 2009
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post #471 of 2010 Old 05-01-2009, 12:25 PM
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The Rod Integrator issue was discovered recently and for some reason doesn't affect every released Lumis. When it does, it causes a shadowing, or image folding affect, in the corners of the image. It may occur in one corner, or multiple corners, it can be 6" long, or 4 feet long, it can bend toward the screen center, or along the sides, it can be very obvious, or not obious at all. It is only/mostly visible in bright scenes, and doesn't affect other aspects of the image. Replacement of the RI is required to fix the issue. All Lumis's arriving after Mid-May will have the new RI.

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post #472 of 2010 Old 05-01-2009, 12:34 PM
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Mine is about 2 to 3 feet long at a diagonal on left and right top corners and you can barely see it ....and only in very bright scenes.
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post #473 of 2010 Old 05-02-2009, 05:08 AM
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Quote:
Originally Posted by Ash Sharma View Post

Mine is about 2 to 3 feet long at a diagonal on left and right top corners and you can barely see it ....and only in very bright scenes.

Mine appears upper right corner with the projector ceiling mounted. It is not always there, it comes and goes and not sure what causes it to appear. When it does show up I can rid of it by toggling DB off and back on again. Ash toggle your DB off/on and see if you get the same results.
With DB off I do not see it. Took me awhile before I ever noticed it.
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post #474 of 2010 Old 05-02-2009, 05:48 AM
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I wonder if replacing the IR could have any negative effect on an already happily converged projector.
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post #475 of 2010 Old 05-02-2009, 09:44 AM
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Isn't the RI's job just to reflect the generated light out of the optics in a rectangular pattern? I'm not sure how this affects panel alignment. I would also think that even if convergence were affected they would correct that as well. I guess this will be answered shortly.


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post #476 of 2010 Old 05-02-2009, 11:19 AM
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Alan. Its replacing the RI not IR. If you fix your post, I'll delete my post in order to keep the discussion clean.

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post #477 of 2010 Old 05-02-2009, 11:41 AM
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I am hoping my calibration does not get wrecked when I send it in for RI fix.
If all the calibration is in the host and I only have to send in the projector! The calibration might not get lost.
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post #478 of 2010 Old 05-02-2009, 11:50 AM
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post #479 of 2010 Old 05-02-2009, 12:08 PM
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Forgive me big fella.

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post #480 of 2010 Old 05-02-2009, 03:00 PM
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Quote:
Originally Posted by mark haflich View Post

But its the same thing as the Snomatte? Not on Stewart's web page yet. Better have dark walls and floors and ceilings.

With the ST100 being a unity gain screen is there anything special about it vs. any other unity gain screen that would require you to have dark walls, floors, and ceilings? Is there really a dramatic difference between the ST100 and ST130 as far as the ST100 requiring dark walls/floors/ceilings whereas the ST130 works in more compromised environments, or are the differences subtle?

I know it is somewhat OT for this thread, but Mark mentioned it and Healthnut just got the material in and has been talking about it. I have to make a decision soon on new screen material for my C3X1080 (hopefully soon to be Lumis) and I am leaning towards the ST100, as I really prefer a screen with no sheen, sparklies, texture, etc.... While I do have medium color carpet/walls/ceiling, my room is far from being a bat cave. Any opinions?
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