i have a couple of da* lenses (1650 & 50135), are they usable? also those photos i seen in this post, are they all taken with a ff lenses or with crop mode in the k1?
Most of the lenses in here are FF lenses. The 10-20 from Sigma is a crop sensor lens.
There is a table in the link to show which lenses are compatible.
https://www.pentaxforums.com/forums...9-da-lenses-full-frame-test-shots-thread.html
Table of results as obtained in this thread (updated regularly):
SMC Pentax-DA primes...
- DA 14mm F2.8: - (clawhammer)
- DA 15mm F4.0: - (Zav)
- DA 21mm F3.2 Limited: - (Boris Liberman)
- DA 35mm F2.4 AL: +++ (aurele ;like FA35/2.0 and no vignetting) (frank)
- DA 35mm F2.8 Limited Macro: 0 (ryno), + (@ 1.15 crop)
- DA 40mm F2.8 Limited: +
- DA* 55mm F1.4 SDM: +++ (aurele)
- DA 70mm F2.4 Limited: +
- D FA Macro 100mm F2.8 WR: +++ (officially specified FF by Pentax)
- DA* 200mm F2.8 ED [IF] SDM: +++? (common belief, but is it true?)
- DA* 300mm F4 ED [IF] SDM: ++ (officially rated "designed for FF" by Pentax patent US7715116)
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...
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
+++: 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 at: https://www.pentaxforums.com/forums...ll-frame-test-shots-thread.html#ixzz4nBPgfyAy
So the 16-50 & 50-135 are not usable in FF mode but in crop mode.
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