The Instax integral film exposes from the rear and the dyes migrate toward the clear front, leaving a fairly sharp (click on it) and contrasty image. The corners appear to be sharper than the center with the standard lens and this distance - worth a close look and comparison to front-exposed integral films.
Since it exposes from the back, no mirrors are needed. This makes it possible to use the Instax film like any other film, if you can make it fit.
F14 or something, a plastic lens I presume, and a simple shutter are what you get with the big Instax 200 or 210 camera, which seems ripe for a graft job. The native lens has a focal length of 90mm or so. Maybe if I put that 90mm Schneider Angulon with a machined adapter I might be able to get a quick result. Even better would be a back that could clip onto the Speed Graphic. This seems quite possible, since the eject mechanism consists only of a little kicker arm to push the exposed picture out enough for two rollers to grab it. Both could be manual. A small crank like the old Kodak "The Handle" would work, and eliminate motors and batteries altogether.
Just light, optics, film and chemicals. ISO 800. Impressive.
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