Originally posted by Talisker The camera doesn't know anything about the lens that the lens doesn't tell it. Sounds as though the lens has the wrong/misprogrammed chip, especially as both cameras report the same issue. You could try it on someone else's camera but I suspect it would be the same. If its a chip programmed for the 70-200 it will presumably mean that SR is not being applied optimally either as the camera will always receive the wrong focal length. If the lens is still under warranty Sigma should correct it.
I am out of warranty. It is odd two different cams report same, my issue is what to do with new 70-200???? I think me is gonna have issues I dont understand as to why a k7 and k20 are stating lens 120-400 is 70-200.
Macca