If it was working the last time maybe is just something simple.
- Try cleaning the contacts with the rubber eraser at the end of a pencil
- Try a new battery, does the F work fine with silver oxides?
- Are you measuring stoped down? or using a non-SMC lens fully opened?
check if any of those help
Originally posted by LosHollyBeach I recently loaded my Spotmatic F with kodak 400 film and now no matter the conditions my light meter stays in the middle. it was working properly the last time i used it and now i dont know whats wrong. is my meter broken? & the battery is only 6 months old