NEC iS15-2K, User Manual

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page 2.4
2. Installation
iS15-2K
Cinema Projector: User Manual
Diagonal screen sizes
Screen sizes are sometimes specified by their diagonal size in inches (D). When
dealing with large screens and projection distances at different aspect ratios, it is
more convenient to measure screen width (W) and height (H).
The example calculations below show how to convert diagonal sizes in inches into
width and height in inches or metres , at various aspect ratios.
2.35:1 aspect ratio
W = D x 0.92 in = D x .023 m H = D x 0.39 in = D x .01 m
2048x1080, native resolution
W = D x 0.88 in = D x .022 m H = D x 0.47 in = D x .012 m
1.85:1 aspect ratio
W = D x 0.88 in = D x .022 m H = D x 0.48 in = D x .012 m
16:9 aspect ratio
W = D x 0.87 in = D x .022 m H = D x 0.49 in = D x .0125 m
1.66:1 aspect ratio
W = D x 0.86 in = D x .022 m H = D x 0.52 in = D x .013 m
4:3 aspect ratio
W = D x 0.8 in = D x .02 m H = D x 0.6 in = D x .015 m
5:4 aspect ratio
W = D x 0.78 in = D x .02 m H = D x 0.625 in = D x .016 m
Notes
D = diagonal (in)
W = width
H = height