Someone's written a small depth of field calculator for Mac OS X dashboard widgets. I'm not sure how useful it is to pop open your PowerBook before you want to take a photo -- that's what the DOF lines on your lens focusing ring are for -- and the PalmOS ones are much handier if you need more detailed info, but I guess some people might be interested: DOFC - Depth of Field Calculator - Dashboard - Calculate & Convert: ""
About DOFC - Depth of Field Calculator
DOFC is a handy calculator for the depth of field, near focus, far focus and hyperfocal distance, no matter what camera you’ve got. It’s the perfect companion for the Apple PowerBook or iBook you probably carry to store and touch-up your digital images. DOFC will hopefully make a welcome addition to your shooting set-up, whether you shoot for soft Bokeh in portraits or ultimate sharpness in panoramic images.
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