Just playing around with a couple of old theater projection lenses that I picked up for pennies. They are brass and disassemble with 4 elements in them. One of the elements covers 4x5 alone and looks pretty good, but I can't leave it in the barrel without another lens behind it.
So, do any of you with more experience have any quick and easy ideas for holding/mounting single glass lens elements to put on the front of my Chamonix 045n-2 in a Linhof-Tech type lensboard? Or any other ideas?