Definetly not scientific.
I had a chance to try me fathers K20D yesterday.
Both cameras I used the same DA* 16-50 F2.8 set at 50mm
Not the best lens, but it's all I had using SDM.
I've offen thought my copy of the K10 has substandard AF performance and the
tests confirmed this for me.
I had my 4 1/2 yr old son run towards me, twice for the K10 & K20 just to see if there is some consistency with my ability using both cameras.
For a pint sized midget, he runs faster than my 6 yr old daughter.
Cameras were hand held using the following setting:
Center point focusing
AF-C
3 FPS cont shooting mode
SR on
Av mode
Matrix metering
AWB
JPEG fine
Battery at least 80% charged on both cameras
The shutter speed on both cameras varied between 1/1500sec to 1/2000sec for all the images taken.
The K10 on both sequences had a hard time trying focus on target, always towards the rear.
I can assure you that all 4 tests the focus point always remained on his chest.
The K20 did a far better job throughout both sequences, although some were OOF.
I only wish I had of hired the Canon 40D 17-55 F2.8 combo just to compair.
I still may just do that to satisfy my curiosity.
I have put a link to Photobucket although the file size is limited, at least you get an overview of the sequence.
The other link has the larger files.
All I have done to the origional images is used Photoshop & resized for web
(jpeg medium).
At least with these's files you can zoom in on the target in the distance without to much pixelation as you get with photobucket images.
I'll let you draw your own conclusions, for me the K20D is a major improvment.
But is it comparable to the other major players.
Photobucket images.
VHDEL/AF Test/K10D Set 1 - Photobucket - Video and Image Hosting VHDEL/AF Test/K10D Set 2 - Photobucket - Video and Image Hosting VHDEL/AF Test/K20D Set 1 - Photobucket - Video and Image Hosting VHDEL/AF Test/K20D Set 2 - Photobucket - Video and Image Hosting
Larger images
Index of /~del/Af Test
Cheers
Del