Hello - I'm sitting here looking at a Kodak camera, which has "Retina" on the back, in a hand-writing sort of script. It has a f:3.5 50mm lens (folds out), and on the lens it says Kodak Compur-Rapid. No model number, the "viewfinder" is sort of dead-center, there is no attachment for flash. I'd love to try using it, and wondering what kind of film to use (35mm? - any particular ISO?) Any help on the model and year of mfgr. would also be intersting. Thanks