5D mk 1 sensor clean
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05-10-11, 01:01 PM
Join Date: Aug 2010
Could be just above the focussing screen. I took the screen out and cleaned above it with lens fluid cleaner.
I did, like a fool, clean the mirror with the fluid too but to no detriment thank goodness!!
Still have a couple of dust / marks when looking through viewfinder though.
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