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Author Message   Brcamera Tinkerer Username: Brcamera Post Number: 142 Registered: 08-2010 Rating: N/A Votes: 0 Posted on Friday, January 06, 2012 - 08:39 am:    Cooltouch, before going any further, you really will need to get an Olympus lens to check and certainly to calibrate your meter. The OM-1 needs to have the body aperture coupling lever engaged with the lens for the meter to operate. There is no provision for stop down metering since Olympus didn't have to deal with backward compatibility of lenses. I still believe that if your meter is off that much, it is mechanical and not electrical unless you have a component breakdown.