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Just thought I'd share a short journey with you guys, it may help someone else.
I have a Mamiya 645 Pro body witted with the AE Prism finder. This week, and coincident with fitting a lens I haven't used before I started to get a red OVER warning in the prism implying that the shot framed was overexposed.
Eventually replacing every variable - battery, film back, lens, it came down to cleaning all the electrical contacts between finder and body with spectacle cleaning fluid. I'd dry wiped them to no avail but a gentle moist wipe has done the trick!
I have a Mamiya 645 Pro body witted with the AE Prism finder. This week, and coincident with fitting a lens I haven't used before I started to get a red OVER warning in the prism implying that the shot framed was overexposed.
Eventually replacing every variable - battery, film back, lens, it came down to cleaning all the electrical contacts between finder and body with spectacle cleaning fluid. I'd dry wiped them to no avail but a gentle moist wipe has done the trick!