Originally posted by Pål Jensen The only professional nature photographer who specificially mention Pentax AF (SAFOX V) says it gives just as many keepers as his Canon 1-series camera. This is in print in a published book with photos of dancing Sifakas something that is much harder to shoot than weddings. Those who whine about AF are usually amateurs to make an excuse to buy a new toy. Pros manage to make AF work regardless of camera. As a nature photographer I have never encountered a situation where AF isn't fast enough.
People always want better. I remember trying to track moving subjects with manual focus. I remember when I loved the Canon eos 3 which had the eye controled focus. It focused where your eye was looking in the viewfinder, well 75% of the time. I wish Canon had continued to develop that technology.
As far as Pentax AF goes it isn't too bad. It works fine for my wildlife images 95% of the time even on the 645D. The only time it becomes a hindrance is in tracking AF; but, I think that is more precision/software than slow AF speed. Granted I don't use SDM lenses too much; primarily the screw driven 645 lenses and my k mount FA* 300mm 2.8 with the focus limit switch... But the tracking AF can be made up for relativly easy by bumping ISO and shooting smaller aperture. Higher ISO is better than no image.
I want something very similar to the K5 (aps-c) still and they had better not change to a new battery on me. I am not likely to buy into a FF from any make for a couple more years as I have the 645D. Aps-c and the 645D make a very nice pair. FF is just pointless. When I need super telephoto I have the K5. When I want to capture all the detail I have the 645D. Perfect combo.
Last edited by atlnq9; 08-28-2012 at 11:29 AM.