Originally posted by cmohr I'm thinking there may actually be something wrong with your camera, and its SR function, not centring the sensor to lens image, try a photo with another lens, but line up something directly in your view finder with the frame you see, and see it the image recorded is offset down and to the right, I'm thinking it has something to do with the auto levelling/horizon function not being quite right, and the extreme wide angle being most effected by it.
My K-30 works just great will all other Pentax glas I have. The described strange behaviour occurs just with the Sigma 8-16 lens in combination with one (of the two) original Li-Ion batteries. I dont use auto leveling and all in-camera corrections are off. I only use visual level check in the viewfinder which comes very handy with ultra wide angles.
I may return the camera but probably Pentax service will find out that the Sigma lens is the cause. I may return the lens and get a replacement to find out that the semi-freeze problem may be gone but the lens may have some other (optical) flaw. Your mileage may vary.
When the problem does occur I can still take pictures and instantly notice its there. I can adopt to the flaw simply by using the lens in MF. Or I could use the other Li_Ion battery which seems to do well. Or I might use Eneloops since they dont give me any reason to complain. Or finally, I could attach 8-16 to any of my other two cameras which are immune to this strange phenomenon.
Last edited by dragra; 08-16-2013 at 12:40 PM.