A worked example
220 cm image width at a 1.5 ratio needs 330 cm lens-to-screen distance.
Throw distance
Calculate a geometric lens-to-screen distance from your projector’s stated throw ratio.
YOUR LITTLE WORKBENCH
ON YOUR DEVICE ✦Throw distance
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THE METHOD / 01
A clear wayfrom start to finish.
Distance = image width × throw ratio.
Keep the assumptions clear
Supply the manufacturer’s ratio. This does not model lens shift, zoom tolerances, ultra-short-throw offsets or chassis clearance.
A FEW USEFUL ANSWERS
Good to know.
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VIEWKIND / TOOLKIT