Projector Field of View Calculator
When writing software for projection mapping it's sometimes useful to know the field of view of a projector. Projector manuals don't normally include this data so you need to do a bit of simple trig to calculate them. I've had to do this a few times so decided to throw it into a Google spreadsheet. To use it, first make a copy of the spreadsheet so you can edit it by going to File -> Make a copy... then enter the horizontal resolution, vertical resolution, screen size and projection distance ...
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