Dear all,(adsbygoogle = window.adsbygoogle || []).push({});

I have a question concerning Depth of Field –*I'm trying to find a depth of field calculation method that applies for video projection. Background info is that I often have projection on non-planar surfaces and like to find a method that allows to calculate (without trying out) if with a given video projector (and lens) and a projection distance and a minimum audience distance a projection is still perceived as being in acceptable focus.

I tried to use calculations from photography optics but the results do not match my mock up tests –*I know that focus is something very subjective –*but the results shouldn't differ by factor up to 20.

I started out using the calculation method by Mike Powell http://www.mycockpit.org/forums/content.php/269-Depth-of-Field

but the result I calculated (for a 30mm LCD chip, 49mm lens @fstop 1.7 and a projection distance of 2.4m) was much too small compared what I perceived in a try out with the projector.

Other calculation methods using photography calculations also yielded no better (and not the same!) results.

Is there any method to calculate this? And why does it not correspond with photography calculations?

best and thanks in advance for your help,

tobistobi

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# Depth of field in projection

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