Originally posted by audiobomber Note that the K-3 disables SR automatically when it detects panning. To me this means that Pentax agrees, SR should not be used for action photography. Some people say that if the panning motion is not smooth, the K-3 SR will attempt to spool up again, which spoils the next images.
I've never tested the above, but I have empirically tested SR on/off by shooting birds in flight. I achieve a significantly higher percentage of sharp images with SR off for panning. SR is not needed at the high shutter speeds you need to freeze motion anyway, so there's no upside to having it on.
Completely agree with Dan on this. Why trust the camera to get it right if you know you're going to be panning, turn it off (or better yet set it as one of the User modes).
Not that anyone here does much in the video department, but I would also suggest turning off SR for all video work. The very poor quality of the digital SR from the K-01/30/50 implementation has been considerably improved - but still not good enough, IMHO.