Originally posted by zagg Could it have been affected by using an old K mount lens from film camera days? After that I put on the 50mm pentax lens that I got with the camera, but still has the problem.
SR works even with old film lenses. You can turn SR on or off with some dials or in the Info menu.
I recommend you dismount the lens, make sure the lens and camera mount are both clean and free of damage.
Modes like 2 sec timer and maybe even modes like HDR bracketing and some others can block SR. Maybe check the manual?