I have a sigma 24-70 f28 mounted on an Alpha 700. I tried to use a sigma 2x teleconverter with this lens and body. The camera won't operate with the two combined. Why?
When lens and teleconverter are combined on this body the camera indicates lens is not on camera. Why?
Cameras - Sigma
Answers & Comments
As the other answers but you could try it on full manual.