I believe one of them is medium format, but the other 2 are large format. I don't know which ones works properly though. The large formats were gifts my mom and sister got at the Rose Bowl Swap Meet a few years ago and the medium format was my grandmas. I need to just bite the bullet, get some film, and shoot away. haha. I have a few 35mm that I should really start using again, as well. I actually tend to us my phone for pictures these days because it is always with me.
How do you like the Pentax so far?