what lenses are you having problems with, are they DA or FA, or even older?
what is your auto iso range set to
how long have you had your K10D for
when you shoot with the sigma, how are you shooting
can you post some of your bad images with the exif intact? (and maybe one good image)
you need to provide us with facts! we cant just magically guess at your problem.
Originally posted by flash1100 shutter = 50 no matter what the Aperture is ( mega over exposed images!)
shooting in daylight
ISO = Auto
From advice on another forum I am now charging the batteries (should have been OK but one never knows) and have gently rubbed the contacts with a soft eraser on the cam and on the lenses. I'll report back when these are done.