I don't know from personal experience, however, Photozone has reviews of
both lenses, (shot with a K10D), they don't take into account sample
variation, but, though it's often mentioned, few do. Here are the pages
for what they're worth.
http://www.photozone.de/pentax/471-pentax_55_14
http://www.photozone.de/pentax/126-pentax-smc-fa-50mm-f14-review--lab-test-report
I expect that in actual use the biggest difference is that the AOV for
the 55 is ~85mm E while the 50mm is ~75mm E. That seems to matter a lot
to some people. Personally while I like 85mm on 35mm film, I find the
difference between 75mm and 85mm to be too small to worry about.
On 6/9/2015 1:30 PM, Larry Colen wrote:
I know that the DA* 55/1.4 is far more modern in construction than the
50/1.4, but in terms of image quality how do the two of them compare?
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