| Author | Message | ||
     Brcamera Tinkerer Username: Brcamera Post Number: 4 Registered: 08-2010 Rating: N/A |
Yes, there certainly can be oil on the blades that is hidden from casual view. There can be oil on the blade where the blade pivot contacts the mechanism and if not there, then the diaphragm control ring assembly. It can take very little oil to slow down the blades. I have had hundreds of lenses on my repair bench and your description of the issue really sounds like oil residue. The first thing I would do is remove the blades and operating rings and completely clean them. Bill |