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04-30-2019, 12:28 PM   #1
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Difference between MC-Pentax-F-35-80mm and MC-Pentax-AF-35-80mm

Difference between MC-Pentax-F-35-80mm and MC-Pentax-FA-35-80mm

I have both lenses but I want to sell one, I can not decide which one. I leave you some photos that take equal conditions and tell me what you think is better.

I also hear suggestions about more efficient tests to detect which is better.

The F seems better in plastics and metal parts, but the FA is lighter

My camera is a K-x and I hope to have a KP or K1 in the near future

I leave photos taken with both lenses equal to the conditions, and photos both lenses

agradezco su ayuda y disculpen por mi ingles, es lo mejor que puede hacer google translate



35mm F22 ISO200 - 35-80- FA


35mm F22 ISO200 - 35-80- F




35mm F9 ISO200 - 35-80- FA


35mm F9 ISO200 - 35-80- F




35mm F4 ISO200 - 35-80- FA


35mm F4 ISO200 - 35-80- F






80mm F10 ISO200 - 35-80- FA
Lens SMC PENTAX-F 1:4-5.6 35-80mm







80mm F10 ISO200 - 35-80- F
Lens SMC PENTAX-F 1:4-5.6 35-80mm





04-30-2019, 12:55 PM - 1 Like   #2
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The FA has MTF data that can be used to set the Program line if the body supports that. The F does not.
04-30-2019, 07:40 PM   #3
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QuoteOriginally posted by boriscleto Quote
The FA has MTF data that can be used to set the Program line if the body supports that. The F does not.
Thanks for your answer, do you know if the K-x supports MTF?
04-30-2019, 08:51 PM   #4
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QuoteOriginally posted by mpessina Quote
Thanks for your answer, do you know if the K-x supports MTF?
The K-x does not. That is a feature that was reserved for the high end bodies (K-10D, K-20D, K-7, K-5, K-5II, K-3, K-3II, K-P. K-1)

05-01-2019, 05:50 AM   #5
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QuoteOriginally posted by boriscleto Quote
The K-x does not. That is a feature that was reserved for the high end bodies (K-10D, K-20D, K-7, K-5, K-5II, K-3, K-3II, K-P. K-1)
PZ-1 does also, which fits as it was a high end body.
05-01-2019, 06:15 AM   #6
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It's probably a matter of just going with your gut feeling. I'd probably just take the F because the FA build quality scares me. But every one has their own criteria as to what's important.
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