older sigma 17-35 screw drive
i was using a sigma 17-35 f2.8-4 last evening to do some night shots on the K1 and was getting some strange stuff on the screen. for instance when adjusting the f stop in manual mode it would show it going to f1.2. when mounted on a tripod it asked me to input the focal length when i turned the camera on. when i looked at the mount compared to the DA* 16-50 it is missing a contact specifically the 4th contact down from a screw holding the mount on the lens body. it seemed to expose correctly after i jumped through the hoops and i shot a few frames this morning in automatic just to see and it seemed ti expose ok even though i rarely if ever use automatic. has anyone has any experience with this lens and can give me some tips on using it. i monkeyed around last night and got some decent shots but this is the first legacy film lens that has acted this way and the first one that i have noticed missing a contact. any information would be helpful. i called sigma and they tried to help but it is an older lens no longer manufactured.
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