Here are results on my tests :

K10D camera on tripod, ISO100, Av mode, WB flash, AF.S, shake reduction off, used lens DA* 16/50mm set on 50mm/f2.8 with AF on,
lighting halogen 200W, fill-in camera flash and FG540 wireless,
applied self-timer on camera (12s),
toke some 10 shots starting from rendering image unsharp by out-focussing left & right;

autofucus gives clear picture on the 14mm front lines of page;
vertical line : centered fine line on viewer for shooting; also here unsharp center; side is sharper to the front;

I suspect this is a front-focus problem; if so how can I adjust this ?

many thanks for replying

Thanks for replying to this;
autofocus was indeed set to AF.C as I thought easier to follow the action. Looking at the pictures, top sides are sharper than middle sections, so I suppose camera could work as to backfocussing ?

Next weekend, I'll set up my camera on 45° stand for doing a focus test on a chart.
I'll keep you posted.
Many thanks

hello, as a newbie K10D'er I am having dificulties in shooting sharp pictures of indoor basketball whereby , of course, lighting there is mostly poor; I use my DA* 16-50 or 50-135 f2.8 zoom lenses;

experiencing with settings results in :
1600ASA, multi segment metering, Tv mode, WB artif. light or flash; autofocus set on lens, image stabil. on body;

results without flash : 1/60 over 1/125, f 2.8
with flash : 1/180 with some varying f;
nearly all pictures are unsharp;

I tested also focussing on a static portrait with some background; this results in a sharper image when I use manual focus;

can anyone comment on what I am doing wrong ?
many thanks & KR