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Forum: Pentax Lens Articles
04-15-2015, 05:41 AM
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I've put up a sticky redirect for now, but I think the system might automatically get rid of it after a few months. Since we already have 3 other stickies in the lens forum, I'm taking of making a consolidated sticky with links to this thread and others.
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Forum: Pentax Lens Articles
04-14-2015, 03:52 PM
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Those won't be affected at all :) I'll go ahead and move the thread.
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Forum: Pentax Lens Articles
04-13-2015, 05:27 PM
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Editing permissions are set on a per-forum basis, so this thread would have to be moved to the lens article section. Would you like me to do that? We could leave a sticky in here directing users to the new thread.
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Forum: Pentax Lens Articles
02-17-2013, 05:05 PM
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On a cheap one maybe! There certainly remains some work to be done with respect to software-correctability, and unfortunately I don't have access to the negatives at the moment. In any case, it has been my experience that even moderate vignetting from consumer lenses can't be compensated for fully in many circumstances, so the 60-250mm isn't a lens that I'd stick on my future Pentax FF.
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Forum: Pentax Lens Articles
02-16-2013, 12:53 AM
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Forum: Pentax Lens Articles
12-10-2009, 04:30 PM
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Just a guess, but at 60x1.3, so 78mm, you'd cover the entire image plane, and maybe around 85mm you wouldn't even have dark corners.
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Forum: Pentax Lens Articles
12-10-2009, 04:08 PM
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DA lenses are not full-frame lenses, barring the 40mm, which is an exception due to its design being similar to that of the M 40mm pancake. A few other primes come close to covering the 36x24mm image area, but aren't quite there, I believe.
DA* lenses use a 1.3x crop factor rather than a 1.5x factor, so they would be usable earlier on at the wide range on a full-frame body than other DA lenses. But no, the 60-250mm is not a full-frame lens.
 Quote: This is the first new lens released by Pentax being specified full frame officially by Pentax. Even the DA* 55mm f/1.4 was not specified as such by Pentax.
So were the previous DFA's. The entire DFA series is full-frame by definition (technically the new macro should be considered an FA J, since it doesn't have an aperture ring, but whatever- Pentax is just bending the rules a little bit).
DA lenses, by definition, are digital-only. While the 40mm gets the job done on full-frame, and possibly also the 55mm, Pentax won't officially admit it just so they can say "ooh look, this lens is designed exclusively for our DSLRs".
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Forum: Pentax Lens Articles
08-17-2008, 03:52 PM
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Forum: Pentax Lens Articles
08-16-2008, 03:55 PM
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Thread copied into the knowledgebase.
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