Do you use "zoom focus?"

Started Dec 16, 2011 | Discussions thread
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KentG
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Re: Do you use "zoom focus?"
In reply to Dan P1, Dec 17, 2011

Current zoom lenses are varifocal not parfocal. Parfocal means that the lens has the same focus point regardless of the zoom setting. Varifocal means that the focus point changes as the lens is zoomed. So whether you zoom in or not the camera must refocus at the new setting to have correct focus.
Kent Gittings

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