Forward – ExpoImaging ExpoAperture User Manual
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Forward
Thank you for purchasing the ExpoAperture Depth-of-
Field Guide the pocket guide that enables photographers
to quickly determine the maximum and minimum depth-
of-field for a given focal length and aperture size.
Today’s advanced technologies make automatic exposure
and focusing a snap, but what you gain in automation you
lose in creative control. If you use an auto-exposure, auto-
focus camera, then your shutter speeds may be slower
than necessary or your aperture settings smaller than
required for good depth-of-field control.
Designed by my late father George A. Wallace as a tool
for professionals, hobbyists, and as a learning aid for
students, it is compatible with all film and digital SLR
cameras. He spent nine arduous months to develop a
depth-of-field guide whose simplicity and utility will
appeal to both beginner and professional alike.