newbie needs help understanding holders, pack film and sheet film
I've been getting back into film and figured why not just take the plunge into large format :) I've always been a DIY kind of person and thought it'd be fun to convert a Polaroid 110/900 into a 4x5 sheet and instant film camera. Of course there are tons of tutorials out there, but I wanted to get a better understanding of film holders, "pack" film and "sheet" film before I start hacking away. I'd like to mod the camera so that I can a) use regular 4x5 film, b) make 4x5 instant prints.
My current impression of a typical 4x5 system is that there is a standard "mount" on a camera onto which a film back is attached. So you load the film back with your film, mount it and shoot away. A couple of questions:
1. Is there a single mount for both of these applications? I have seen videos of people using "Graflok" mount, is this standardized, and is it the same as an "international" mount? Can these be purchased separate from a large format camera?
2. Is instant film also loaded into a back? And are instant backs compatible with regular negative/slide backs?
I know that to a large-format camera person these questions might sound silly, but I'd really appreciate a breakdown of how things fit together. Of course, please pardon any confusion of the terminology, and feel free to correct me. Thanks in advance!!