Metabones Speed Booster for Pentax K lenses?

Started Apr 14, 2013 | Discussions thread
MightyMike
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Re: Metabones Speed Booster for Pentax K lenses?
In reply to BobORama, Apr 15, 2013

Mathematically it should actually increase the contrast, as for the CA that depends on the parent lens and speedbooster combination but in many cases it could reduce the CA

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