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05-11-2012, 05:50 PM   #1
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Zone focusing with an A lens

Does zone focusing work with A lenses that have the aperture setting at A? If so, how do you do it? (I know how to read the focus marks when you manually set the aperture, of course. )

05-11-2012, 06:01 PM   #2
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Set the AF switch to manual focus, set the focus distance and aperture to give the required zone of focus and shoot, either in Aperture Preferred auto, or manual (set the shutter speed for correct exposure).
05-11-2012, 06:21 PM   #3
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About those zone focus marks: They're calibrated for FF cams. You should adjust by 1 f-stop for APS dSLRs. Now, hyperfocus is zone-focus where the zone extends to infinity. For hyperfocus, I adjust by about 1.3 f-stops, just to be SURE that infinity is in focus. So for non-infinity zone-focus, if I set the aperture to f/11, I read the marks at f/8. For hyperfocus, I read them at around f/7.

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