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06-17-2008, 11:38 PM   #1
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Join Date: Apr 2008
Location: Barcelona, Spain
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Focusing problems on zoom lenses

Hello. I was just thinking about back or front focusing issues on lenses and I have a question:

If a zoom lens is suffering from back focus, does it affect all the focal range? or maybe it could be detectable when shooting on short focal and not on long one?

Thanks!!

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