Originally posted by boriscleto The Sigma lens has an aperture ring. Is the ring set to the 'A' position? There is a small button on the ring that has to be pressed to position the ring on 'A'.
Thanks very much. Needed to be set to A position. Works fine now. Thanks again.
---------- Post added 03-07-14 at 04:17 PM ----------
Originally posted by elliott Does the lens have an aperture ring? It must be set to the A position to work properly in all modes.
If it doesn't have an aperture ring or it is already set to A then the contacts are likely dirty.
Thanks very much. Needed to be set to A position. Works fine now. Thanks again.
Read more at:
https://www.pentaxforums.com/forums/58-pentax-beginners-corner-q/253884-troub...#ixzz2vFdBXI69