Light leak on 120mm back, Mamiya RZ67

Hey guys,

You've all been so helpful getting me up to speed on my recently purchased Mamiya RZ67. After running a roll of film through one of the 120mm backs, I can safely say that the camera itself works great!

...BUT... there appears to be light leak in one of the 2 backs. While I have not tested the 2nd 120mm back, you can see the light leak in the these images: http://imgur.com/a/w13YK

There's no fogging or anything on the film, you only see the leak in the one place at lower shutter speeds. Is this simply a sealant issue? There are no light leaks on the polaroid back, so I'm assuming it's not some other mechanical issue?

Thanks!

You mean 120 film back, not a 120mm film back. It is probably a light seal leak.

Place the/a negative with the light leak over the film plane opening in the Roll Film Holder with the emulsion facing the lens and the top of the image at the bottom of the opening. Probable place is the Roll Film Holder hinge, 2nd is the seals.

I forget how the RZ67 backs are constructed, but on my RB67, a leak light that (across the neg, but some distance in) generally was due to a failure of the felt light trap in the darkslide opening. Light would pipe along the darkslide and expose a part of the negative.

I solved this by generally not inserting the darkslide unless I needed to once I'd taken it out, and then if I needed to by shielding the darkslide opening from direct light.

Hey guys, just trying to troubleshoot a light leak that looks a lot like yours, OP. I also suspect it's the dark slide seal. Were you ever able to nail it down? I am wondering if you were able to replace the seals yourself? If so, where did ya get them?

Cheers!