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HDTV, Cinemascope, etc.

post #1 of 5
Thread Starter 
I'm pretty settled on buying a Panasonic PT-AX100U projector for my home theater system, but had a few questions.

I just ordered a 106" electric screen (Da-Lite Designer Contour with the Video Spectra screen material) in HDTV format. How do you handle different formats on a screen that has a fixed aspect ratio? I currently have a plasma TV that simply stretches the image in different ways (does a great job--almost unnoticeable) to make these other formats "fit" the screen. Do projectors have this capability, too? If so, do they generally do a good job? I've even tinkered with the idea of making some "drops" that I can affix to the screen casing via magnets or what have you to cover up a portion of the screen to create other sizes like cinemascope, etc. The bad thing, of course, would be adjusting the projector image, refocusing (maybe?) and so-on. How difficult a task would this be? I've never owned a projector/screen setup before, so I'm trying to get as prepared as possible to cover all contingencies in the movie-watching arena.
post #2 of 5
My suggestion would be to go into the Constant Height forum and do a little reading. I believe that the Panasonic will do the streching that you refer to but the best in my opinion is to do a constant height setup. Basically you would mask a cinemascope screen on the sides to from 2.35 to 1.85 to 1.33 aspect ratios.
post #3 of 5
If I am viewing a cinemascope movie on my 16x9 screen and I want it to take up the whole screen instead of placing the bars at the top and bottom (too cheap to buy the anamorphic lens currently), I simply crank up the overscan on my PJ. Most of the time, I just ignore the bars. Some folks make special masking for their screens.
post #4 of 5
Thread Starter 
Okay--you lost me there. What is an anamorphic lens, what does it do and how much does it cost? Also, what does cranking up the overscan do?
post #5 of 5
Anamorphic lens - some PJs are able to stretch the picture from a cinemascope movie to fit in a 16:9 space, making everything tall and thin. The anamorphic lens sits in front of your projector and spreads that picture out to 21:9 format at the same height as the 16:9 picture but 30% wider. This is what the theatre does. The effect is amazing and few people who experience it in their homes will live without it. Anamorphic lenses are very expensive for the budget crowd - currently, you can get a great deal for $495 from an Alliance partner of this forum, here is the link:
http://www.avsforum.com/avs-vb/showt...8#post10075098

On my HD70, the overscan will effectively zoom out the movie to very close to the entire height of the 16:9 DLP chip but it will clip off about 10 to 15% from each side of the movie as it does this since it can only show 16:9, not the full 21:9.

For much more detail on the anamorphic subject, go to the panamorph website for easy to understand pictures and see the thread on Constant Image Height for an exhaustive discussion.

http://www.panamorph.com/index.html
http://www.avsforum.com/avs-vb/showthread.php?t=554901
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