Web Analytics RiceHigh's Pentax Blog: FA31 F1.8 Limited on 36M a7R - Test Samples with 100% Crops

Sunday, February 21, 2016

FA31 F1.8 Limited on 36M a7R - Test Samples with 100% Crops

Tested at f/8 and ISO100, manual peaking focusing:









Last Tested: DA*55 F1.4 on 36M a7R: Part 1 and Part 2
Time (UTC +0800):
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wuestlinger's avatar - Go to profile

wuestlinger 24p · 474 weeks ago

Sharpness is pretty good, isn't it? CA is visible in the corners but that's to be expected, and can be corrected in software, I assume. I wonder how other lenses on the A7 perform. Do you have matching lenses, maybe Zeiss, to compare them to? Then it might be interesting to take pics with both next time.

Also, regarding the depth-of-focus markers on the FA lens. Do they still apply correctly with modern hi-res sensors? Have you tried?
19 replies · active 473 weeks ago
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Lutz's avatar - Go to profile

Lutz · 474 weeks ago

What about a FA 20/2.8 or an optically identical A 20/2.8 lens? I have both. I'm sure they will be sharp in the center, but I'm concerned about corners. Own testing has to be postponed by at least six weeks.
2 replies · active 473 weeks ago
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Max's avatar

Max · 474 weeks ago

At f/8 all primes are sharp. What's the point?
1 reply · active 474 weeks ago
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RJR's avatar

RJR · 474 weeks ago

My lenses are a FA* 80-200 f2.8, a FA* 85 f1.4, a 31 F1.8 limited, a Voigtlander 58 f1.4 and a 1,7x AF adapter
I know those would work in a K-1. I know you made tests with the 85 with a 5D body with very good results http://ricehigh.blogspot.com/2009/01/compatibilit...
What about the 80-200...is there any information about how would this lens perform in a FF body?
Despite the chromatic aberrations, I'm affraid about resolution at corners....36MP are a lot of MP...
4 replies · active 473 weeks ago
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zosX's avatar

zosX · 473 weeks ago

That CA in the corners is nothing. Try a DA 17-70 or a 16-45 and get back to me about CA lol. This lens looks really good on FF. I hear all the time this lens is nothing special and overrated. I also hear that it is the best from many lovers of this lens. There seems to be no middle ground. I have to say though, these samples all look like the resolution is mostly pretty good. Note: I do not own one myself, but surely wouldn't mind. :)

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