Originally posted by BigMackCam Interesting. So is it consistent or random in nature?
Consistent and severe in tungsten, normal in natural light.
Some K-5's had this tungsten light issue and returning the body for service did not help. Some K-5's were helped by a firmware update, but the K-5 still has a reputation for inferior AF performance. AF improvement was the main reason for the K-5 II release (improved AF in coloured light, f2.8 sensor and focus tracking).
I would never recommend a K-5 to anyone who uses auto-focus lenses. It should never have been released, they should have gone straight to the K-5 II. The K-5 tarnished Pentax's reputation thanks to its autofocus woes. I blame greedy Hoya.