Mamiya Press Camera shooting dud exposures occasionally

[mamiyapress67]

I’ve been using this camera body for about 6 years. It’s a tank ! However the film backs break about once a year .. so I’ve been through about 5 now - get to a point where they stop stopping at frame 1 when loading and will just burn through rolls . At that point I’ve replaced them . I’m on my second 100mm lens now also - my first still works just has seen better days . You can see the dud exposures on the two rolls to the left . Was curious if you think it’s an issue with the film backs / pressure plate . And or a lens malfunction? Thanks

 

[cgw127 153]

Film backs leak light or occasionally don't advance correctly. But since you're dealing with leaf shutter lenses, I'd vote for a sticky shutter.

 

[480sparky50 49]

I agree. Time for a CLA.