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Author Message   Brcamera Tinkerer Username: Brcamera Post Number: 96 Registered: 08-2010 Rating: N/A Votes: 0 Posted on Wednesday, June 08, 2011 - 05:53 pm:    Well, this would most likely not be related to switches. Sounds like a mechanical issue with the shutter or related mechanisms from your description. The blades should be totally dry, no lubrication. Problem could be some oil or sticky substance on the shutter blades. In this case, VERY careful cleaning can be done on the shutter blades but if you are not careful, the blades can bent or damaged and then the shutter is history. If the problem is in the shutter itself, there really is no easy fix short of removing the mirror box and shutter for repair, probably not recommended if you have not had experience and proper tools to do deconstruct the camera! Bill