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10-08-2008, 03:17 PM   #1
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focusing

why is it when you zoom in on a subject, get confirmed focus, zoom back out, and snap , the target area becomes out of focus.
taking into consideration the subject to sensor plane distance did not change

Dave

10-08-2008, 03:44 PM   #2
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It sounds like your lens is a varifocal lens, not a parfocal lens.
10-08-2008, 03:50 PM   #3
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Original Poster
i have the 16-50 and 50-135
which are these suppose to be
Dave
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