My buddy cleans out houses and he came across these cameras. He knew that I have a small collection going and he gave them to me. I was wondering if anyone could tell me about them. I got a kodak duaflex, a brownie reflex synchro model, and some polaroids. 1. do they make film for these? 2. is the aperture adjustable? 3. are they worth anything? 4. do they still make film forthem?\ 5. I cant seem to figure out how to open the Brownie camera. 6. Anything else I should know? 7. do any of these take batteries or are they mechanical? I can post photos if need be.