Originally Posted by AgX
But typically the diaphragm is closed by outer force and opened by internal spring-force. Thus grease related problems show up during opening, not closing.
Yes on a screwmount Pentax. Not on the Nikon I have in front of me. I don't know about the Pentax K mount.
Last edited by E. von Hoegh; 08-01-2013 at 03:46 PM. Click to view previous post history.
Reason: Correct mistake