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11-04-2009, 03:16 AM   #1
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Minolta AF lenses on Pentax DSLR

Hi, my relative just informed that he has these early 90's Minolta AF lenses (alpha mount I believe) Minolta 50mm f1.4 Minolta AF 50mm f/1.4 lens - Wikipedia, the free encyclopedia and Minolta AF 70-210mm f/4 lens Minolta AF 70-210mm f/4 lens - Wikipedia, the free encyclopedia

I could buy them cheap but I believe there's no out of the box adapter for Pentax bodies? My Pentax K-X needs a nice prime. I guess there are some issues with focus to infinity because of the construction. I found this mod thread but I'm not sure if it's relevant:

Any suggestions?

Last edited by shittii; 11-04-2009 at 03:22 AM.
11-04-2009, 05:25 AM   #2
Lowell Goudge's Avatar

Join Date: Jan 2007
Location: Toronto
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the register distance for minolta AF lenses is 44.6 mm, and pentax is 45.46mm, so you are correct, you will not get infinity focus unless you can reduce the mount by about .84mm.

this might be possible by removing the existing lens mount and using a flanged M42-K mount adaptor, but yoiu may have other issues with other parts of the lens hitting the mount.

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