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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.
- And ideally, no filter is mounted.
- 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...
- DA 10-17mm F3.5-4.5 Fish-Eye ED [IF]: FE, see #59, #61, #94. 10mm: heavy vignette / 14mm: almost no vignette / 17mm ++ (Reps, froeschle, Gooshin)
- DA 12-24mm F4 ED AL [IF]: - (below 16mm, xitek.com), o (at 18mm, architorture), + (at 20mm, architorture), ++ (at 24mm, architorture)
- DA 16-45mm F4: - (below 21mm, Nesster)
- DA* 16-50mm F2.8 ED AL [IF] SDM: - (xitek.com)
- DA 17-70mm F4 AL [IF] SDM: - (KjetilH)
- DA 18-55mm F3.5-5.6 AL: - (at 18mm, Spongefingers; below 23mm, xitek.com)
- DA 18-55mm F3.5-5.6 AL II: missing
- DA 18-250mm F3.5-6.3 ED AL [IF]: - (xitek.com)
- DA 50-200mm ED: -
- DA* 50-135mm F2.8 ED [IF] SDM: - (elho_cid)
- DA* 60-250mm F4 ED [IF] SDM: ++ (officially rated "designed for FF" by Pentax patent US7489452) probably good on full frame but evaluation still missing; the rating is +++ with a baffle modification, + without)
- DA 55-300mm F4-5.8 ED: 0 (+, ++ at tele end, viking79)
Sigma K mount DC...
- Sigma 18-200mm f/3.5-6.3 DC: -
- Sigma 10-20mm f/4-5.6 DC: - (below 14mm, Gooshin)
- ...
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