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12-04-2017, 12:08 PM   #2131
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QuoteOriginally posted by pres589 Quote
If the DA*55 didn't cover the full image circle presented by film or the K-1's sensor, vignetting wouldn't be removed simply by stopping down the lens, right? It'd be a hard edge of black that was always present, right?
Vignetting can be resolved by stopping down in many cases. The image circle of some lenses grows a lot when stopped down. This is especially important to large format photographers who need to use camera movements to secure depth of field. It's pretty easy when tilting the lense forward to run out of image circle, stopping down is how to get it back.
The way you could tell if an image was going to be vignetted was to take off the film back and look at the lens from the corners. If you could see the entire aperture, it was a safe bet that there would be no, or at least minimal, vignetting.

12-04-2017, 05:04 PM   #2132
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QuoteOriginally posted by Mistral75 Quote
If the dimensions indicated by 国国64 are correct
Hard to say, but IMO the D FA* is slightly smaller than depicted.
It might be wishful thinking.
12-04-2017, 07:40 PM - 3 Likes   #2133
ogl
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Pentax K-1 HD Pentax-D FA* 50/1.4 SDM AW.
ISO 400, f/1.4, 1/160
http://www.kutuzov-photo.ru/images/stories/Misha_Pentax_HD_50_1.4.jpg
12-04-2017, 11:39 PM   #2134
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QuoteOriginally posted by ogl Quote
Pentax K-1 HD Pentax-D FA* 50/1.4 SDM AW.
ISO 400, f/1.4, 1/160
http://www.kutuzov-photo.ru/images/stories/Misha_Pentax_HD_50_1.4.jpg

Wow!!!

12-05-2017, 12:32 AM   #2135
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QuoteOriginally posted by ogl Quote
Pentax K-1 HD Pentax-D FA* 50/1.4 SDM AW.
Very nice sample.
That razor thin DOF!

Hard to assess overall sharpness wide-open, but around the centre it certainly seems OK.
12-05-2017, 12:49 AM - 2 Likes   #2136
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QuoteOriginally posted by rawr Quote
That razor thin DOF!
Yup! - that's one sharp eyebrow
12-05-2017, 01:31 AM   #2137
ogl
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for 36 MP, ISO400 and 1.4 - it's really sharp.

eyebrow and center part of forehead and some part of nose
12-05-2017, 02:08 AM   #2138
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I think some grain was added on that picture in PP. Still its nice.

12-05-2017, 02:17 AM   #2139
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It really is sharp. There is lots of details in focus area. Ofcourse it is also quite a bit PP.d according to photographers taste. But it will be interesting to wait more of these examples. They will be popping up more and more so
12-05-2017, 03:13 AM   #2140
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Lens ID unknown. It is sharpened a bit.
12-05-2017, 03:34 AM - 1 Like   #2141
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The second model isn't quite as attractive as the first...
12-05-2017, 04:40 AM   #2142
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QuoteOriginally posted by Rondec Quote
The second model isn't quite as attractive as the first...
In your opinion! He does make the lens look good though.
12-05-2017, 06:56 AM - 3 Likes   #2143
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QuoteOriginally posted by Belnan Quote
In your opinion! He does make the lens look good though.
It's the internet, mine is the only opinion that matters.
12-05-2017, 08:16 AM   #2144
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QuoteOriginally posted by Rondec Quote
It's the internet, mine is the only opinion that matters.
I would have said "it's the only one that matters in my house" but even that would be wrong.Tess's is the only one that matters.
12-05-2017, 09:49 AM   #2145
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Ricehigh postet size comparison in his blog
Dimensions are similar to Sigma ART 50. The only good thing about the dimensions is that we get weight for the moeny we pay and that the 24-70 extended to 50mm is even longer. Still the D-FA 50 will be big and the 85 version will be huge. I don't mind the price tag, availability is holding me back - for the 85 and probably for the large aperture prime - years to come.
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