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10-03-2011, 01:46 PM   #1
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Pentax-DA 50-200mm F4-5.6 ED

So.. I'm looking at a Pentax-DA 50-200mm F4-5.6 ED lense (not WR) for the camera that I'm going to pick up for my wife for Christmas. The body will be a K-r or K-x depending on the price when I purchase it.

The question I have is while I understand the PK lenses from my film bodies will work on the K-x/r bodies, will this (and other digital lenses) be backwards compatable to my M and A film bodies?

10-03-2011, 02:32 PM   #2
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No, it will not cover the full film area. It is a crop lens. Also it lacks the aperture ring that is necessary for the M range of bodies.
10-04-2011, 09:57 AM   #3
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elho cid is quite right. Some longer DA lenses won't vignette on full-frame, but most DA's will. And while you can live without an aperture ring on an A-body, a DA is pretty useless on an M-body. The most recent lens lines that will work on an M-body are DFA, FA, and FAJ. Also, the DA50-200 doesn't get the greatest marks for optical quality. Not bad, just not great. You might want to check the lens reviews. Good luck!
10-04-2011, 03:23 PM   #4
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Rio - FAJ doesn't have aperture ring either. How about trying to get a good F 70-210 used? Quite compact, good IQ, perhpas better than 50-200 and will work on any K-mount camera without restrictions.

10-04-2011, 09:42 PM   #5
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QuoteOriginally posted by elho_cid Quote
Rio - FAJ doesn't have aperture ring either.
Oops, you're right. FAJ would work on A-body but not M-body cams. Duh...
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