Anybody know what the so-called T-distance is for the graflex 12-shot 4x5 bag magazine? (ie, the distance from the outside edge of the holder (film side) to the actual film plane)? I can measure, but I was hoping for an official specification.
Also: any suggestions re: the red window? Is it safe to use this to count exposures, or was this built with orthochromatic film in mind? I do the red window trick with one of my 120 film cameras, but I'm not sure how light-proof the back of these bagmags are.
Finally: what's the proper method to open the back to get to the film septa? It snaps open if I pull hard enough but I'm afraid I'm doing it wrong - maybe I should slide it one way or the other before I pull, or maybe there's a release latch I overlooked?
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