Originally Posted by snyderkv
One more question Josh, I spoke to DNP who said they will make me a custom 2:35 screen and asked me for the dimensions. I gave them these dimensions based off of this website http://www.draperinc.com/ProjectionScreens/CustomSizeCalculator.asp
Would these be the correct measurements to give to a custom fabricator?
The difference between those numbers and the ones I posted just comes down to rounding. They are both within the margin of error out a few decimal places. So long as the width divided by the height rounds to 2.35, you should be fine.
Should I go 2:40 to elimnate tiny black bars on 2:40 sources material?
That's entirely up to you. I didn't think it's worth the effort, personally. You can just zoom the projector out a little so that the black bars spill off onto your frame and you'll never see them. Other people are more bothered by this. Only you can decide if it will bug you.
Keep in mind that the vertical stretch mode built into projectors and Blu-ray players calculates the stretch based on an expected output of 2.35:1. If you need an exact 2.40:1, you'll have to add a Lumagen video processor that will let you program a custom 2.40:1 ouput, but that's another big expense. In my view, a 2.35:1 screen is the path of least resistance. Your mileage may vary.
(This is assuming that you plan to use an anamorphic lens. If you're doing the Zoom Method, you'll be fine either way. Just pick what you like.)
I wouldn't be surprised if standard TVs go from 16:9 to 2:35 someday.
That's very unlikely. 16:9 was chosen as the HDTV standard because it's the mid-point between the narrowest ratio (4:3) and the widest (2.35:1). There's around 80 years of TV programming made in 4:3 (some still is today), and a couple decades more at 16:9. The 16:9 ratio is a logical shape for a living room TV. 2.35:1 is really only for those of us with dedicated home theaters, and we're a minority.