Originally Posted by
GrumpyDiver
Old enlarging lenses are excellent for 2D copying work, using lights and a copy stand. They were developed to project a flat, contrasty image.
Robert - my old Schneider lenses definitely were anti-reflection coated and had that slight purple tinge that was common on lenses that were produced in the 1970s.. Anti-reflection coatings are also required to minimize internal reflections from the lens elements and was important tool in getting a contrasty image. These got damaged in a flood a few years ago and got thrown out. I just had a quick peak at my Leica Colorplan projector lens - same era and same anti-reflection coating is visible. I guess that they were put together "backwards" with respect to how they were designed from that standpoint, Light hits the back of the lens, rather than the front. I suspect that is what you are referring to?