Originally Posted by
Dan Fromm
As far as I know there are none. Front cell focusing lenses on small format folders are usually triplets or tessar types. If I were you and were determined to go the way you've laid out I'd beg, borrow or buy a 5x7 camera and obtain a few ~ 200 mm tessar types and triplets and then experiment to see how well they work when their front cells are screwed out.
If, however, I wanted to shoot 4x10 hand held and was sure that a smaller format with the same aspect ratio that will fit on, say, 5x7 won't do and had the skills and equipment to make a camera from scratch, I'd make a 4x10 clone of a Crown Graphic or similar press camera.
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