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09-06-2015, 09:05 PM   #1
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Fa 43 vs. Da* 55 - which "normal" would you choose on FF?

I realize FL/FOV are different, and the answer will be subjective (depending on shooting style, etc), but I'm curious to hear people's thoughts on which of these will make a better "normal" lens on the upcoming FF camera. Look forward to your viewpoints...

-Brandon

09-06-2015, 09:55 PM   #2
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The only reason I have kept my FA43 (beyond sentimental and aesthetic concerns) is to be a compact "true" normal on 36x24 format. I have never really liked the field of view on APS-C, although it does render beautifully on occasions.

My DA*55 isn't going anywhere though. It should be great on either format.
09-07-2015, 12:49 AM   #3
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I like my FA 43 Ltd. But it has to be stopped a bit. The corners are soft.
09-07-2015, 06:08 AM   #4
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QuoteOriginally posted by Sandy Hancock Quote
The only reason I have kept my FA43 (beyond sentimental and aesthetic concerns) is to be a compact "true" normal on 36x24 format. I have never really liked the field of view on APS-C, although it does render beautifully on occasions.

My DA*55 isn't going anywhere though. It should be great on either format.
I rather like my DA 40 perspective on APSC. The 43 is close in focal length, Am I just odd?

09-07-2015, 06:18 AM   #5
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QuoteOriginally posted by UncleVanya Quote
Am I just odd?
Obviously

Seriously though, I acquired a used FA43 because I wasn't happy with where my DA40 sat in my lens collection, and I sold the DA because I preferred the rendering of the FA. It still doesn't change that both are a bit nowhere on APS-C (for me at least).
09-07-2015, 06:24 AM   #6
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I like doing intimate short distance portraits with the DA 40 as well as just walk about shots. Give that it is a 60mm equivalent and 58mm was a rather common normal lens I don't see the awkwardness. But I also don't have a 31.
09-07-2015, 06:29 AM - 1 Like   #7
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QuoteOriginally posted by UncleVanya Quote
I like doing intimate short distance portraits with the DA 40 as well as just walk about shots....
But I also don't have a 31.
And I do, which might be part of the difference.
Really these sort of threads are pretty pointless. Most of us want to justify what we have
09-07-2015, 06:46 AM   #8
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"Normal" focal length for 35mm cameras was 50mm in the early days largely because of the original lens designed for Leica. With the advent of SLR cameras in the 1950's both 55mm and even 58mm lenses became common "normal focal length" lenses. The old rule was that a normal focal length should have a FL equal to the diagonal of the film's dimensions*, which for FF 35mm is a bit over 43mm. Therefore even 40mm is "long" on APS-C, and 30mm or better 28mm would be very close to correct. However, way back (1960's?) one of the photo magazines decided to test human visual perception by comparing what an artist saw or included in a painting versus which FL on a 35mm camera would record the same scene. They went to France where artists had painted small towns such that the exact spot where the artist had been could be determined by the perspective of individual buildings and how they overlapped with more distant buildings. At least for those artists they examined, the camera lens that best matched as I recall was about 105mm. We tend to pay attention to a much narrower FOV than we can actually see, but that doesn't mean that a photograph that excludes our peripheral vision will look more "natural."

*This provides an diagonal coverage of about 53 degrees, thought to match the angular view of the human eye.

09-07-2015, 07:23 AM   #9
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QuoteOriginally posted by HYS Quote
I like my FA 43 Ltd. But it has to be stopped a bit. The corners are soft.
Are there any tests on the conner sharpness of DA*55 on FF?
09-07-2015, 10:57 AM   #10
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QuoteOriginally posted by 54nima Quote
Are there any tests on the conner sharpness of DA*55 on FF?
Not specifically focused on corner sharpness, but this article does give a good overview:

SMC Pentax DA* 55mm f/1.4 on Sony A7R : ERPhotoReview
09-07-2015, 11:39 AM   #11
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Maybe I'm stupid, but I doubt that Pentax is going to go through its entire apsc optimized line of lenses and find the ones that cover the full frame image circle and unlock them for ff. I would put money on the da line being cropped for use with the full frame. Seems that everyone on this board is assuming that any lens that will cover the image circle will be 'full frame compatible'



So maybe the *55 isn't worth discussing until we find out
09-07-2015, 12:12 PM   #12
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I think it's been determined as a near certainty that any APS-C lens mounted on the new Pentax FF will trigger automatic sensor cropping to accommodate. Perhaps multiple manually-selected formats for APS-C only lenses would be available in the menu, perhaps a square format? or an APS-C rectangle that was vertical? Portrait shooters might like that.
09-07-2015, 12:21 PM   #13
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Pentax would be stupid not to determine the lenses that are FF and make accommodations for using them easily since they have such a small number of lenses new and ready to purchase available at launch.
09-07-2015, 01:17 PM   #14
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In my days as a film-shooter (on Canon AE-1s!) I always preferred a 35mm as "Standard" rather than a 50mm. So my FA43 will e the first lens I put on my Pentax FF DSLR, probably followed by my FA35mm f2!
09-07-2015, 01:31 PM   #15
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I think Pentax will probably have an auto crop available, but I am sure it will be able to be turned off for those who wish to do their own cropping in post. Biggest thing with the DA *55 on film is that there is some decent vignetting wide open. But that's true of plenty of other full frame, wide aperture lenses out there. The FA 50 f1.4 has quite a bit of vignetting wide open as well.

(a couple of DA *55 shots on film)



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