Well there I was, making a purchase of a Russian glass-plate camera, when I am offered a Jena APO Germinar 9/600 lens. Now, in addition to my ongoing make-your-own-film-on-glass lunacy, I have been entertained the idea of ULF for a long time. I grabbed the lens, and am now wondering, good idea--or bad. What formats would this thing work on? Is it the same as the Docter Optic lenses going by the same name?
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