All Forum Comments
Comment by johnriley posted on Should we post-process? at 22/09/2009 - 15:20
Don't all AF lenses automatically register the focal length?
Also don't forget that some lenses from other manufacturers do sometimes register some information incorrectly. I must check the EXIF in that respect.
Comment by johnriley posted on Tokina 80-400mm Pentax KAF fit at 22/09/2009 - 15:17
The bayonet fit is smooth as silk, the AF snaps in at all focal lengths and of course the A setting on the aperture ring means the lens is totally compatible. The SR system also works correctly with it, without needing to be told what it is.
So far so good, I'll post some test shots when I can.
Comment by johnriley posted on Tokina 80-400mm Pentax KAF fit at 22/09/2009 - 14:26
Comment by johnriley posted on Weekly Competition #115 - Yun at 22/09/2009 - 12:39
A digitally designed lens has a telecentric design that makes sure light exits as close to 90 degrees as possible.
The edges of a film lens aren't used by an APS-C sized sensor, so this isn't so much of a problem. A Full Frame sensor could have a problem with some lenses.
Comment by johnriley posted on Pentax 645D Release Date at 22/09/2009 - 12:34
Good luck!
Comment by johnriley posted on Nothing suitable from Pentax, so I've gone Nikon at 22/09/2009 - 08:55
Comment by johnriley posted on Pentax LX 2000 at 22/09/2009 - 08:52
So I don't buy collector's versions, just cameras to use.
A shame as it is very desireable!
Comment by johnriley posted on Pentax LX 2000 at 22/09/2009 - 08:17
Aren't these all a little wide for landscapes unless you're looking for the ultra wide skies?
The Pentax 12-24mm is also very useable for critical applications such as architecture, because of its excellent control of distortion. In this respect it's better than the 14mm and certainly better than the Sigma 10-20mm.
Comment by johnriley posted on Is width everything? at 22/09/2009 - 08:11
The AP review of the Tamron 10-24mm was reasonably encouraging, at least as good as the Sigma 10-20mm.
Comment by johnriley posted on Is width everything? at 22/09/2009 - 00:11

