Can't we watch the anamorphic DVD/HD-DVD this way? - AVS Forum
Forum Jump: 
 
Thread Tools
post #1 of 16 Old 12-07-2007, 09:41 AM - Thread Starter
Member
 
Kilav's Avatar
 
Join Date: Jun 2001
Location: Virginia, USA
Posts: 26
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
May be I'm thinking in a wrong way.

Our room is 20' Long X 15' Wide X 8' Tall
Projectors: Sony BRAVIA VPL-AW15 or EPSON PRO CINEMA 810

100% of the viewing in this room are for movies only using HD-DVD player (HD-A3). We are thinking about building a 2:35 ratio screen because most of the movies we rent are 2:35 format. I was wondering if we really need an anamorphic lens to fill up the screen if the DVD/HD-DVD is already in 2:35 ratio. Can't we just zoom the lens so that the pricture part will fill up the entire 2:35 screen? I understand that we will have to side mask if the DVD format is 16:9.

Please help.
Kilav is offline  
Sponsored Links
Advertisement
 
post #2 of 16 Old 12-07-2007, 11:55 AM
AVS Special Member
 
Axel's Avatar
 
Join Date: Mar 2002
Location: Metro Detroit, MI, USA
Posts: 4,638
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
Liked: 13
Quote:
Originally Posted by Kilav View Post

May be I'm thinking in a wrong way.

Our room is 20' Long X 15' Wide X 8' Tall
Projectors: Sony BRAVIA VPL-AW15 or EPSON PRO CINEMA 810

100% of the viewing in this room are for movies only using HD-DVD player (HD-A3). We are thinking about building a 2:35 ratio screen because most of the movies we rent are 2:35 format. I was wondering if we really need an anamorphic lens to fill up the screen if the DVD/HD-DVD is already in 2:35 ratio. Can't we just zoom the lens so that the pricture part will fill up the entire 2:35 screen? I understand that we will have to side mask if the DVD format is 16:9.

Please help.

You are correct. Zooming only is possible, but you will loose resolution (basically the pixels that are then 'wasted' for the black bars). For some people that is perfectly OK. You may want to check out this thread.
____
Axel

Axel is offline  
post #3 of 16 Old 12-07-2007, 09:15 PM - Thread Starter
Member
 
Kilav's Avatar
 
Join Date: Jun 2001
Location: Virginia, USA
Posts: 26
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Axel,

Thanks for the reply and the link.

These panamorphic lenses cost about $500+ . I can't justify to spend that money for a PJ which cost only #1000.

Looks like we will have to live with zoom for now loosing some resolution.
Kilav is offline  
post #4 of 16 Old 12-08-2007, 01:33 PM
Advanced Member
 
adude's Avatar
 
Join Date: Dec 2005
Location: SoCal
Posts: 714
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Liked: 15
You can go DIY route. Get the prisms, build a casing and the mount for it. Will probably cost around $200~250 + few days time. I built this way and now enjoying CIH.

There is tons of information on building these at AVSforum and DIYaudio site. I found most concise info at http://www.zuggsoft.com/theater/prism.htm

A Dude.

Manoj
adude is offline  
post #5 of 16 Old 12-08-2007, 06:34 PM - Thread Starter
Member
 
Kilav's Avatar
 
Join Date: Jun 2001
Location: Virginia, USA
Posts: 26
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
adude,

Thank you for the info on prism route.
My skill level for DIY stuff is medium level. Let me give it a try.
On to reading....
Kilav is offline  
post #6 of 16 Old 12-10-2007, 05:08 AM
Senior Member
 
John Martin's Avatar
 
Join Date: Dec 2005
Location: Fort Mill, SC
Posts: 471
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
I agree to try and go the DIY route. One day I will get a better lens but for now I will live with the one I am making. I just got my two prisms last week and plan on working on the lens sometime this week. Total cost for the whole lens (using MDF I already had) $93. Will be building mine according to the website listed above as well.

Priceless.

John
John Martin is offline  
post #7 of 16 Old 12-10-2007, 07:32 AM - Thread Starter
Member
 
Kilav's Avatar
 
Join Date: Jun 2001
Location: Virginia, USA
Posts: 26
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
John,

Do you mind telling me where did you get your prisms from?
And what sizes you need them?

(Also curious to know how your project came up when you are done with it)

Thanks.
Kilav is offline  
post #8 of 16 Old 12-10-2007, 06:31 PM
Advanced Member
 
adude's Avatar
 
Join Date: Dec 2005
Location: SoCal
Posts: 714
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Liked: 15
Many people here bought it from Crystal Factory or
Massillon plaque. I bought CWD57 from Crystal factory and got the Anti Reflection coating done in the AVS group few months back. Getting the 5"x7" prisms will ensure that it will work with most of the projectors but that's my opinion. When ordering the wedges, tell them to ship it with no engravings at all.

Couple of guys bought the prisms from Surplus shed (at ebay or their site http://www.surplusshed.com/pages/item/l9113d.html). Buying from ebay is cheaper. These prisms are really small. So unless you have a very long throw projector, these won't work. Make sure about that before you order.

I built a simple MDF casing and sled mount using the keyboard shelf from Home Depot two weeks back. The experience is simply amazing. I am watching all the scope movies again.

Manoj
adude is offline  
post #9 of 16 Old 12-29-2007, 02:47 PM
Advanced Member
 
roar's Avatar
 
Join Date: May 2006
Location: Burlington, Ontario
Posts: 562
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Just another guys opinion on zoom vs prism.

I bought my DIY prisms a LONG time ago it seems and I still have not built an enclosure for them yet. I had bought them even before my projector (Ended up with the Panny AX100U). Since I have gotten my projector in June or so of this year I have set the prisms up a number of times and have been very pleased with their performance... but... I am still using the zoom method the majority of the time.

Personally I don't think I'm missing much (if any detail) to my untrained eye with zooming. My content is now exclusively HD, I haven't watched a SD movie in months and I think the quality is so amazing my motivation to build an enclosure is very limited. Until I figure out my permanent mount for my projector I will continue to zoom.

I recommend contacting the mfg directly for the prisms and see if you can find them cheaper locally, I emailed the mfg and they send me a list of local trophy shops that they supply and I was able to pick up my 5x7's for $30 cdn a piece rather then $45 or so other places are selling them, and no shipping charge! Just a thought.
roar is offline  
post #10 of 16 Old 03-21-2008, 10:30 AM
AVS Special Member
 
curtishd's Avatar
 
Join Date: May 2004
Posts: 1,740
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Liked: 13
Quote:
Originally Posted by roar View Post

Just another guys opinion on zoom vs prism.

I bought my DIY prisms a LONG time ago it seems and I still have not built an enclosure for them yet. I had bought them even before my projector (Ended up with the Panny AX100U). Since I have gotten my projector in June or so of this year I have set the prisms up a number of times and have been very pleased with their performance... but... I am still using the zoom method the majority of the time.

Personally I don't think I'm missing much (if any detail) to my untrained eye with zooming. My content is now exclusively HD, I haven't watched a SD movie in months and I think the quality is so amazing my motivation to build an enclosure is very limited. Until I figure out my permanent mount for my projector I will continue to zoom.

I recommend contacting the mfg directly for the prisms and see if you can find them cheaper locally, I emailed the mfg and they send me a list of local trophy shops that they supply and I was able to pick up my 5x7's for $30 cdn a piece rather then $45 or so other places are selling them, and no shipping charge! Just a thought.

Building a casing is one thing but how do you all "set up" the prisims (pics please)? Also are the left and right edges of the image sharp just like the center of the image?
curtishd is offline  
post #11 of 16 Old 03-21-2008, 12:29 PM
Senior Member
 
John Martin's Avatar
 
Join Date: Dec 2005
Location: Fort Mill, SC
Posts: 471
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Mine are set up like this in the left side of the image



And a photo of my lens in a temporary mocked up housing



And a screen shot of the image on my living room wall at about 8' wide. Prisms are just sitting in the housing and are not mounted at all and can move easily

John Martin is offline  
post #12 of 16 Old 03-21-2008, 01:03 PM
AVS Special Member
 
Steve Scherrer's Avatar
 
Join Date: Nov 2001
Location: Crystal Lake, IL
Posts: 1,843
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Stunning, John. Thanks for posting.

Registered U.S. Patent and Trademark Attorney
Steve Scherrer is offline  
post #13 of 16 Old 04-24-2008, 10:56 PM
Advanced Member
 
syncguy's Avatar
 
Join Date: Nov 2006
Posts: 737
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
IMO, lens is better than zooming, but many others may disagree. Lens will give you more brightness, about 33% more than zooming. However, resolution gain is debatable, since the additional resolution that was created by the projector stretch was not there in the original content. Anyhow, an anamorphic lens will produce an outstanding and awesome picture when coupled with a good quality player and a projector.
syncguy is offline  
post #14 of 16 Old 04-26-2008, 07:32 AM
Newbie
 
gordhome's Avatar
 
Join Date: Jun 2006
Posts: 12
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Quote:
Originally Posted by adude View Post

I bought CWD57 from Crystal factory and got the Anti Reflection coating done in the AVS group few months back. Getting the 5"x7" prisms will ensure that it will work with most of the projectors but that's my opinion. When ordering the wedges, tell them to ship it with no engravings at all.

Couple of guys bought the prisms from Surplus shed. Buying from ebay is cheaper. These prisms are really small. So unless you have a very long throw projector, these won't work. Make sure about that before you order.

I built a simple MDF casing and sled mount using the keyboard shelf from Home Depot two weeks back. The experience is simply amazing. I am watching all the scope movies again.

Hi adude
When you say you had your anti reflection coating done in the AVS group, what do you mean by that? Is there a service that does this? Can you point me in the right direction?

Thanks!
gordhome is offline  
post #15 of 16 Old 04-26-2008, 06:24 PM
Advanced Member
 
adude's Avatar
 
Join Date: Dec 2005
Location: SoCal
Posts: 714
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Liked: 15
gordhome,

We bought the prisms and got the anti reflective coating done at L&L Optics in southern california. This is the thread where its discussed. http://www.avsforum.com/avs-vb/showthread.php?t=822656

I am not sure if L&L optics does the coating for just one pair prisms, but try giving them a call.

Manoj
adude is offline  
post #16 of 16 Old 04-26-2008, 06:51 PM
Advanced Member
 
syncguy's Avatar
 
Join Date: Nov 2006
Posts: 737
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Wish to note that there would be differences in coating. Some type of coatings could be different to others. One example is recent Panamorph upgrade from UH380 to UH440/480 which is an improvement to the coating.
syncguy is offline  
Reply DIY Constant Height

User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off