Rate this post by selecting a number. 1 is the worst and 5 is the best.

Author Message   Steve_s Tinkerer Username: Steve_s Post Number: 144 Registered: 07-2006 Rating: N/A Votes: 0 Posted on Wednesday, February 04, 2009 - 03:04 am:    Do the diaphragm blades appear oily? If not take the lens-mount off and check that everything is moving freely at the back. If you need to clean the diaphragm I can give you some directions.