Some more notes, it has occurred to me that I may want to try the camera as is.īefore I set out, I wanted to know the apertures. The only other concern I have, okay, it's one among many, that the correction lens will interfere with the mirror in the top taking lens section properly called the viewer box.īecause the instant back, just like in the Diana, will most like sit further back (who knows what will happen to infinity focus), there is a chance I could mount the viewing lens more forward than the taking lens.Īnother hope I have that somehow the correction lens distance to the aperture/shutter plane will some alter the focal length of the lens overall and therefore, once adjusted, to have infinity focus with the instant back (Instax back.who are we kidding?). The instant back pushes the film plane further back. It corrects, I believe, for a longer length. The toy cameras, when set up for the instant film, require a 'correction' lens that fits in the body before the aperture and shutter. Mamiya had 55mm lenses for the system and they projected into the body nearly as much as they projected forward, it seems to me. I'll have to build a lensboard with a shutter mechanism that is quite thin if I want infinity focus. I do want to use the Diana lenses as a viewing and taking glass (I know they're plastic).įifty-five millimetre for a focal length is a bit of a challenge. But I feel I can tinker to correct those flaws. They have been reported to have build and jamming problem. The goal is to turn the TLR into an instant camera. The Diana F+ Instant cameras I picked with my wife on Thursday afternoon. The twin lens reflex camera you see on the top left is a Mamiya C3 Professional which I bought at a garage sale in May.

Mamiya c3 how to use the