All Forum Comments
Comment by johnriley posted on K5 question re focus point selection at 03/11/2011 - 11:30
It isn't quite so clear-cut anyway as lenses do not have a flat field, with the exception of macro lenses. Which is the greater error is a moot point. In any event the effect is only apparent at quite close distances.
Comment by johnriley posted on K5 question re focus point selection at 02/11/2011 - 23:30
Comment by johnriley posted on SMC Pentax-DA 35mm f2.4 AL For Sale at 02/11/2011 - 14:03
Comment by johnriley posted on SMC Pentax-DA 35mm f2.4 AL For Sale at 02/11/2011 - 13:23
[IMG]http://i240.photobucket.com/albums/ff250/johnriley1uk/048ModelCollection800.jpg[/IMG]
Comment by johnriley posted on SMC Pentax-DA 35mm f2.4 AL For Sale at 02/11/2011 - 09:33
MInt condition in every respect. Includes box and all original accessories. Current price at SRS and Jessops is £134.00 and £134.95 respectively. Asking price £110.00 including shipping to anywhere in the world. Payment by PayPal, UK cheque or UK postal order.
[IMG]http://i240.photobucket.com/albums/ff250/johnriley1uk/001-35mm-f24-800px-1.jpg[/IMG]
[IMG]http://i240.photobucket.com/albums/ff250/johnriley1uk/004-35mm-f24-800px-2.jpg[/IMG]
Comment by johnriley posted on SMC Pentax-DA 35mm f2.4 AL For Sale at 02/11/2011 - 09:29
Comment by johnriley posted on Pentax Photo Gallery at 02/11/2011 - 08:32
I like the older way with the Fn button a bit better but as I hardly ever use anything but center focus it's not a major issue for me
Comment by johnriley posted on K5 question re focus point selection at 02/11/2011 - 08:31
Comment by johnriley posted on FA 31mm f1.8 AL Limited - offer at 01/11/2011 - 15:04


There have been experiments done with focusing and manual focusing was shown to be quite unpredictable. Many people cannot recognise the point of greatest sharpness and contrast.