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

mpessina · 04-30-2019, 12:28 PM

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

**boriscleto** · 04-30-2019, 12:55 PM - **1 Like**

The FA has MTF data that can be used to set the Program line if the body supports that. The F does not.

mpessina · 04-30-2019, 07:40 PM

Originally posted by boriscleto

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?

**boriscleto** · 04-30-2019, 08:51 PM

Originally posted by mpessina

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)

**UncleVanya** · 05-01-2019, 05:50 AM

Originally posted by boriscleto

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.

normhead · 05-01-2019, 06:15 AM

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.

04-30-2019, 12:28 PM	#1
mpessina New Member Join Date: Apr 2019 Posts: 4	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

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04-30-2019, 12:55 PM - 1 Like	#2
boriscleto Loyal Site Supporter Join Date: Dec 2009 Location: North Syracuse, NY Photos: Gallery Posts: 16,167	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
mpessina New Member Join Date: Apr 2019 Posts: 4 Original Poster	Originally posted by boriscleto 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
boriscleto Loyal Site Supporter Join Date: Dec 2009 Location: North Syracuse, NY Photos: Gallery Posts: 16,167	Originally posted by mpessina 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
UncleVanya Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery \| Albums Posts: 23,417	Originally posted by boriscleto 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
normhead Pentaxian Join Date: Jun 2007 Location: Near Algonquin Park Photos: Gallery \| Albums Posts: 39,450	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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