Why Manual Focus Only?

Started Sep 9, 2010 | Discussions thread
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Noogy
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Why Manual Focus Only?
Sep 9, 2010

Positive reviews aside, I am actually curious why would any one prefer manual-focus only lenses over those that over the AF/MF flexibility. Does it have anything to do with image quality?

http://www.the-digital-picture.com/Reviews/Zeiss-21mm-f-2.8-ZE-Distagon-Lens-Review.aspx
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Noogy
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Canon EOS 7D, Canon EOS 400D, Canon D10, Lumix TZ5, Kodak V1253

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