Are there any native 2.35:1 DVDs? - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 4 Old 07-05-2001, 06:03 PM - Thread Starter
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My husband and I are planning our home theater and trying to decide what size front projection screen to get: 4:3, 16:9, or 2.35:1. Please see the Screens forum for our discussion there.

I just read the Ultimate Guide to Anamorphic Widescreen DVD (for Dummies) on the DigitalBits site:
One link from the article:
shows a side by side comparison of a scope format/2.35:1 film in an anamorphic vs. non-anamorphic DVD. On the right/anamorphic side in frames 1 and 3, the caption text says that the black bars on the top and bottom have been added to the video signal itself so that the image will display correctly in 16:9.

If that is the case, then a 2.35:1 film on an anamorphic DVD will appear letterboxed (albeit with narrower bands of black) even on a 2.35:1 projection screen (with bars also on the left and right the same way an old 4:3 film appears on a 16:9 DTV), would it not? Since the bars are in the signal itself?

Then are there any DVDs released in their native 2.35:1 format so that a 2.35:1 screen can take full advantage?

If not, then there will be no point to us considering a 2.35:1 screen at all...



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post #2 of 4 Old 07-06-2001, 02:50 AM
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First of, "scope" aspect ratio (2:35:1) is an anomorphic widescreen film format...

Second, I know of no "native" video material shot in 2:35:1. Thus all video material transferred in this aspect ratio will have black bars above and below the active image (so will 70mm 2:21:1 and 35mm spherical 1:85:1 and 1:66:1 film formats to a lesser degree). The so-called video anomorphic "enhancement" adds back 33% of resolution lost in the production of those black bars, a substantial amount...

But before other optional alternatives can be explored, what is the intended size of the desired screen and what type of display device or projector have you folks got in mind? What about the HT room's dimensions and image throw distance? These are important parameter to account for...

I am using a scope (2:35:1) aspect ratio screen of 12 foot width dimensions. A D-ILA display device projects video images (I also project 70mm, 35mm, and Super-8mm film formats on that same screen). Using a Isco I anomorphic lens attachment allows me to produce a scope image that totally covers the full width and height of the screen, but I have mechanical means of adjusting the "throw" of the light projected by the D-ILA relative to the screen's placement and desired image size, although height remains constant while width been the only alterable parameter. Costly, somewhat complicated and complex...but it works...

Hope this helps a little...

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post #3 of 4 Old 07-06-2001, 07:09 PM
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Most dvd's coming out that are anamorphic wide screen are 2.35:1. I just went through the same process and settled on a hdtv format(16x9, 1.77:1). This seems to be very popular for many reasons. Go to the Screens section of avs for more info. Before you decide, you should definetly get a copy of CinemaSource's guide " Front Projection Screen Design Guide". It is free on their site. it is 75 pages long and I wish I had it when i was looking. Also, buy a Stewart Screen.

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post #4 of 4 Old 07-07-2001, 10:34 AM
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There are 2.35:1 DVD movies that are 'enhanced for widescreen tv's/anamorphic'. Some DVDs say 'anamorphic' and some say 'enhanced for widescreen tvs'. Both terms mean the same thing when refering to DVDs. This whole topic can get confusing because 2.35:1 movies were shot with anamorphic lenses, but that doesn't mean that they are anamorphic on the DVD. I prefer using the term 'enhanced for widescreen TVs' rather than 'anamorphic' when talking about DVDs. As long as everyone understands what 'anamorphic' is refering to, that is all that is really important. When talking about DVDs 'anamorphic' means that the DVD has been encoded in a widescreen format (1.85:1) to keep all of the resolution. It doesn't necesarily mean that the movie is 2.35:1. If the movie is a format wider than 1.85:1 then small black bars will be added to the top and bottom so the movie fits the 1.85:1 format (1.66:1 movies can be done this way as well, but rarely are becasue it means adding small black bars to the left and right instead of top and bottom.) There are no black bars on the left and right, just on the top and bottom for widescreen movies. When these DVDs are played back on a 4:3 tv then the dvd player (If it is set-up for a 4:3 tv) will drop lines of resolution from the movie and add black bars so the movie looks correct on a 4:3 tv. If a DVD is not 'anamorphic' then it is encoded in a 4:3 format on the DVD with black bars already added on the top and bottom of the picture (letterboxed) to all widescreen movies, regardless of format. This makes the DVD no different to a VHS tape or laser disc with a letterboxed movie. The DVD will still look better than the vhs and LD, because the format is better. The DVD will have to be zoomed in on a widescreen TV to fit the screen. You will not see the black bars if it is a 1.85:1 film (if it is a 1.85:1 screen), but you will still see some of the black bars for a DVD with a wider scope(2.20:1, 2.35:1, etc....)

To make a short story long, all this means is that 'anamorphic'/'enhanced for widescreen DVDs' have more resolution than a dvd that is letterboxed. Anamorphic does not refer to the aspect ratio(scope) of the film on the DVD. A way to see the difference is rent the movie only version of the Rock and the Criterion version of the Rock. The movie only version is not anamorphic and the Criterion version is. You will need a widescreen TV for this comparison.

A 2.35:1 film on DVD should look fine on a 2.35:1 screen. I guess it would be set-up so that the small black bars would be just off the screen on the top and bottom. I don't know how a 2.35:1 screen works with 1.85:1 films, or any other films not as wide as 2.35:1. Without some sort of tweak a 1.85:1 film would have some of the picture be higher and lower than the top and bottom of the screen. I think a 1.85:1 or 16:9 screen works fine. I never notice the small black bars from 2.35:1 films on DVD.

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