Xrays.Dew.temperature extremes. Misloaded film. Dust or mould on lens. Physical damage. Shutter mechanism life is limited and they need to be pre emptively replaced. External flash sync. Problems between flash sync and shutter speed. Light meter false readings due to dirty light meter lenses.

All of these are real. I'm a professional photographer and I own this camera in my historical collection.

What's my point? Fuck OOP