I have a Polaroid 500 back that came with my speed 4x5 what film does it use ,, thank you

Technically speaking it used film that was discontinued when the 545 back came out in the 80s. But there was a workaround so you could use the sheet film that was made up until a few years ago (type 52,54,55,68,69). But now it's a piece of history, unless the Impossible Project starts making sheet film.

Les

When I got mine in the 80s I was told it was obsolete.... The workaround I never knew.. "I could of been a contender" What will it take to convince the impossible project to do the next to impossible.