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Author Message   Michael_linn Tinkerer Username: Michael_linn Post Number: 100 Registered: 04-2011 Rating: N/A Votes: 0 Posted on Friday, August 30, 2013 - 10:51 am:    This camera has a mirror damper flywheel which produces some of the same problems as the well-known Canon flywheel issue when the lubricant gives out after 20 years or so. That would be my first guess. Alkaline cells should be no problem at all.