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16:9 and 4:3 conversion

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Joe Murphy Jr

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In Reply to: 30" Wide Screen vs 32" 4:3 ? posted by kyzyltuva on October 25, 2002 at 13:20:37:

Rule of 92
I use the Rule of 92 for 16:9 (1.78:1) movies. If you have a 4:3 display, then just multiply the diagonal size by 92% to get the on screen movie size. Here's an example using a 50" 4:3 display: 50 x .92 = 46" diagonal screen size of equal 16:9 display. If you have a 16:9 display and want to know how large a 4:3 display would have to be to display the same diagonal movie size, then reverse the process: 60 / .92 = 65.22" diagonal screen size of equal 4:3 display. It's accurate to a quarter of an inch.

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Re: 16:9 and 4:3 conversion - kyzyltuva 05:55:00 10/27/02 (0)
Yes, this sounds exactly right- a 30" 16:9 wide screen
image, using your formula, would require a 32.67" 4:3
conventional screen. So a 30" Wide is very close to a
32" conventional. (For letterbox images, not for 4:3 imaages)

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