Hi everybody,
I would like to open up a thread dedicated to one topic:
DA lens on Full Frame: a sticky test shots thread.
This thread shall be dedicated to test shots of a DA lens mounted to a full frame body (e.g., a film camera body). By test shot, I mean shots dedicated to evaluate the performance. Shots of ordinary subjects aren't suitable to this task, normally, and should not be posted. So, these are the rules:
- K mount lens dedicated to the APS-C form factor is used.
- Image is taken full frame 36mm x 24mm.
- Lens hood was removed.
- The aperture used is specified (note that film cameras don't record EXIF...).
- Sample image shows the entire field of view.
- Sample image(s) show(s) corner, border and center performance at 10MP-100% (multiple crops, or single not-resized image).
- The subject is such that resolution and vignetting at the borders can be compared to the center.
The idea behind this thread is obvious: To compile enough data to assess the spectrum of available lenses for a forthcoming full frame DSLR in K mount.
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Table of results as obtained in this thread (updated regularly):
SMC Pentax-DA primes...
SMC Pentax-DA zooms...
Sigma K mount DC...
- Sigma 18-200mm f/3.5-6.3 DC: -
- ...
Tamron K mount Di-II...
Overall rating scale:
+++: no significant difference between APS-C and FF corners
++: difference but usable at full aperture with a small loss in corner IQ only
+: usable staring at f/4~f/5.6, with no or a small loss in corner IQ only
o: usable at f/11 or with big loss in corner IQ only
-: not usable
Read more here: https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/31629-da-lens-full-frame-test-shots-thread.html