I was rummaging in the barn and remembered that back in about 1951 my dad bought a rather exotic German microfilm reader, which I have ended up with. It took a reel of 35 mm. microfilm and projected it on either its own fold-out screen or, with a trick 90 degree attachment, on a wall or ceiling. Anyway, it has a Steinheil 60 mm. F4.5 Culminar as its main lens, and it occurred to me to try it out. I bodged up a mount with a piece of a zoom lens and a piece of Exakta extension tube and a couple of setscrews. The DOF is terribly shallow, it's hard to hold steady, and it's not ideal for focusing without bright lights, being so dark, but it has a kind of nice look to it. I probably will put the microfilm reader back together, but thought I ought to throw this one into the general projection lens roundup....
These are with a D7100, unassisted daylight, and even with live view the focus is pretty iffy. Very little room for error.
