Quote Originally Posted by ww12345 View Post
Yeah, I did buy that... Didn't realize they were cassettes (like 35mm cassettes - that makes more sense then...) and that they go in a film back. That's pretty convenient actually. Other than the developing, it sounds like 70mm is more like what I want: more shots between reloading...
Make sure they all have spools in them. You need a spool per canister.

What camera do you have? Backs are readily available for RB/RZ, Hasselblad (500) and Graflok (2x3 and 4x5) but I'm not sure what else, probably there are backs for the other modular system cameras (Pentax and Bronica 645s) but I haven't looked.