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Forum: Pentax SLR Lens Discussion
07-25-2016, 11:39 AM
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The 35 would sell for €100 max.
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Forum: Pentax SLR Lens Discussion
07-24-2016, 04:08 PM
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Your test look a bit complex to set up honestly. f/2.8 and up the lens would be very sharp everywhere... and you need imatest etc to see any actual small differences.
I did a quick test to be sure the lens wasn't a lemon when I received it... That was the goal. And I posted it here to show other how it fared, so one get an idea of a 100% crop. Most often review just provided MTF numbers.
For me the lens work well enough... That's the essential part. And I took a few hundred pictures with it already then... But of real subjects...In the end it is the practical experience of the lens that tell you the truth. Sharpness => Does that mean that f/1.8 and f/2 are really usable or would you always stop down to f/2.2 or f/2.5 at least? Does the lens render better than cheapers lenses like DA35 f/2.4 or DA35 f/2.8 ? What about skin tones?
At some point as I have the 3 (for now) I might do a DA35 f/2.4 vs DA35 ltd vs FA31.. shoot. But the DA35 ltd will go on sale soon.
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Forum: Pentax SLR Lens Discussion
07-24-2016, 01:15 AM
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Well actually the sharper your lens, the larger the f-stop you need. Some explain seriously that the benefit of a lens like basic FA50 f/1.4 is that it is soft at f/1.4-f/2, while it is insanely sharp at f/4 onward. So when you choose the apperture, you not only choose the dof but the sharpness. People always assume perfect sharpness is necessary corners to corners. But that just more work to do in portrait pro or equivalent. Except if you are obssessed with very shallow dof shoot, it is more practical to have a setting that also control sharpness very easily (apperture) than have to get down to f/1.2 to compensate for the lens being too sharp.
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Forum: Pentax SLR Lens Discussion
07-23-2016, 01:07 PM
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Forum: Pentax SLR Lens Discussion
07-23-2016, 12:40 PM
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Agree but I displayed 100% 24MP crops. Even a decent sized 12x16" print would mean the crop would be only 2x3" basically. Using CTRL- with your browser and you'll see that all the sharpness difference is lost. Only dof and constrast difference remain visible... And part of the lost constrast can be got with PP while any lens with same framing and apperture would have the same dof...
Sure f/1.8 is not as good but still good enough. Only the photographer and us gear fanatics look at 100% crops ;)
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Forum: Pentax SLR Lens Discussion
07-23-2016, 09:22 AM
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I am sure it is nice on the FF... Wider image circlue but also bigger photosites.
Too much to my liking... Its 30% I think but in France the beast is 1200-1400€ new :(.
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Forum: Pentax SLR Lens Discussion
07-23-2016, 07:13 AM
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I am sure Sigma 35 f/1.4 is nice and does a great job. would be too big for me essentially. But I would not be surprized to find very high MTF at f/1.4 - f/2.
But some reviewers (I think ephotozine) would share the joy of using FA31 explaining that it render very well. Photozone would give the lens a high rating. Lenstip conclusion is negative and is not able to explain the rendering. They only find that it flare, soft on borders bellow decency level at wide appertures, has many optical aberrations and that cheap offering of Canikon perform better...
While most of their finding are likely true, I think they missed the point to actually look if the picture taken are good enough in practice or they looked great or bad outside of imatest. I mean even their sample picture that often look so soft popped with the FA31 and showed nice bokeh but they didn't manage to see it.
To me the lens is sharp enough and good enough at f/1.8-f/2 and I think that what is actually relevant. You can use it at all appertures. Well that my point at least ;)
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Forum: Pentax SLR Lens Discussion
07-23-2016, 06:48 AM
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Forum: Pentax SLR Lens Discussion
07-23-2016, 06:43 AM
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Ok so I just received my FA31. Despite the dull weather I took it for a walk around in the local park to get a feeling of it.
People says that the lens is not sharp at f/1.8, lenstip review would complain that FA31 is really bad and unjustified. I knew this was somewhat wrong even through there was possibilities for a bad sample.
So I tested my sample... First post you get in attachment:
- full scene (at f/4)
- f/1.8 crop
- f/2 crop
- f/4 crop.
Sure the f/4 crop is better but I get the impression that even wide open quite nice and already f/2 get a noticable improvement... This K3 24MP 100% crop, so 1/6 of the picture in both direction, equivalent to 280mm on FF.
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