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2.35:1 Rabbit Hole
This thread has 20 replies. Displaying posts 16 through 21.
Post 16 made on Saturday May 18, 2019 at 05:35
Brad Humphrey
Select Member
February 2004
On May 17, 2019 at 21:48, FunHouse Texas said...
It cannot increase the actual resolution; there are only those original 1920 x 800 pixels in the 2.35:1 source to begin with.

But it does use all the pixels on the projectorís imaging chips, which is where you get the potential for added brightness. The downside is A possible loss of resolution due to the added processing and optical elements involved. The latter could also potentially decrease image contrast.

You don't get how this works. 1st with anamorphic, you are not dealing with 1920x800 pixels in the 2.35:1 - the 2.35:1 is using all the 1920x1080 pixels of the format (encoded anamorphic - that is what that means). It is stretched vertically in the anamorphic format.
The external lens then stretches that back out horizontally to the correct 2:35.1 ratio on the screen. AND uses all the 1920x1080 pixels to do it. Without this method, you would be doing as you mentioned, just using 1920x800 pixels; and losing resolution.

Back in the days of the good ole DVDs, you had to make sure you bought the disc with the 'anamorphic' format on it and simple not letter boxed. Or you didn't get the resolution benefit.
Post 17 made on Saturday May 18, 2019 at 09:45
Junior Member
February 2018
No, Funhouse is correct. Blu-ray is square pixels and there is no anamorphic encoding in the spec. A 2.35:1 movie is 1920x800, the black bars are in the encoding. I don't recall if it was added back in to UHD spec
Post 18 made on Saturday May 18, 2019 at 17:52
Brad Humphrey
Select Member
February 2004
Hmmm.... confusing for sure. Doing a quick search to try and refresh my memory, gave a lot of back & forth answers both ways. I couldn't find an official statement about anamorphic bluray. Got a link?

Panamorph's website does however get into talking about anamorphic 4K & 8K.
Post 19 made on Sunday May 19, 2019 at 23:38
Founding Member
March 2002
Since we do a lot of this here are the differences and the pros and cons of each.

Zooming - Easiest method and should not be done on curved screens. The resolution is ~1920 x 800 or 3840 x 1600 for 4K. Because their is no processing with this image it is the cleanest and most accurate. The downside to zooming is brightness. When you make an image larger it is not as bright. You lose ~25% brightness because your 123" diagonal is actually ~175" diagonal when you zoom for 2.35 if you didn't have the black bars. Also, because you are not using the full 1080 (or 2160) pixels you lose even more. I call zooming the poor man's method of 2.35:1 screens.

Lens - Definitely use for curved screens. While you can not add resolution to the source you can get a perceived resolution increase through upscaling when stretching the picture vertically to fill in the black bars. This makes the picture tall but everything looks correct once you stretch the image horizontally with the lens in front of the projector. The downside to this is it isn't as accurate or pixel perfect but usually only noticeable on test patterns. The plus side is the picture is noticeably brighter.

So while zooming might be more accurate and probably give a sharper image most would appreciate the perceived better detail from upscaling and definitely the increased brightness when using a lens.
Post 20 made on Monday May 20, 2019 at 19:46
Long Time Member
November 2010
Waiting for the lens to zoom is basically like saying to your client that you donít like them and they are poor. Use a lens instantly switch. Happy people (Brightness too HDR is a beast)
"If they give you ruled paper, write the other way"
Post 21 made on Monday May 20, 2019 at 21:33
FunHouse Texas
Active Member
June 2013
they tell me they are poor all the time.. i don't mind..
I AM responsible for typographical errors!
I have all the money I will ever need - unless i buy something..
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