Nikon F50 Instruction Manual page 49

Replacing lithium
battery for imprinting
function
3. Remove used battery.
1. Make sure that film is not
loaded, open the camera back.
4. Insert new battery with "+"
terminal facing upward.
2. Loosen the silver screw on the
inside of the camera back.
Remove the battery chamber
cover.
5. Replace the battery chamber
cover and tighten the screw.
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