Forum: Pentax SLR Lens Discussion
06-16-2011, 10:55 AM
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I only see 3 links here and none contain an f1:1.2 lens. I personally would pass on all of the ones that do show for portraits. Possible exception would be the 55 f2.0 but it's a Screw mount (M42) lens and will require an adapter. The M50 f2.0 lenses that I've owned were quite soft down to f5.6 or so before they really begin to sharpen up. I typically tell anyone who asks, the A (or M) 50mm f1:1.7 lenses are the best bang for the buck. The 1.4 is better in my opinion and the 1.2 is simply gorgeous. Both have current asking prices well above what they are historically worth however (in the USA). If you want to do some comparing of the various 50(ish) mm offerings at different apertures, check my 50mm shootout. The tests were all done at infinity but it may give you some idea of what each is capable of. Index of /Photos/50mmShootout
These were all done with the K5 by the way.
If you're willing to go to $300ish, I think a better Portrait focal length is the 85mm. Look into the samyang/vivitar etc 85mm f1:1.4. That lens is plenty portrait sharp even wide open. Vivitar Series I (nee Samyang) 85mm F1.4 Aspherical IF Lens Reviews - Fixed Focal Lengths - Pentax Third-Party Lens Review Database
:cool:
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