Originally posted by Jester_rm To be fair, I believe what RH was saying was that good high ISO performance (pics at high ISO look good with low noise) does not necessarily equate to good low light camera performance (exposure accuracy in low light, autofocus speed and capability in low light, etc.). High ISO isn't only used in "low light" situations...at least as far as I know.
No having owned a K10 or any Canon, and the K20 not even in final firmware yet, I can't comment or speculate on any of them myself.
I agree, RH is commenting on the system, and if the AF and metering remain relitively unchanged, you should not expect any difference in the performance. The real question is, is the performance of the metering and AF on the K10D good enough.
That will always be an opinion. Good enough for what?
As I commented in an earlyer post, I have shot A LOT at high ISO with pentax cameras, and not on sunny bright days where all I wanted was to get 1/4000 shutter, but in dark auditoriums and dance halls photographing musicals and dance performance, using only stage lighting.
I have never had a problem with focusing performance on any of my cameras. Note lighting is only able to give 1/60 at F2.8 and 1600 ISO. shots are hand held, focus is sharp and precise, no noticible hunting.
Now, having said that, if I point into a dark shadow, where the lighting is well below the specified minimum EV for the camera, then no it won't focus well, but I should not expect it to. Why should the camera be able to focus on things I can't even see with my eye?