ExpoImaging ExpoAperture User Manual
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Step 4 - Locate the number of zones for your desired
depth-of-field on the front of the Guide to find your
aperture setting.
f16 is the largest aperture you can use to get 1 depth-of-
field zone. Therefore, use f16 with your 200mm focal length
to get depth-of-field from 120’ to infinity.