Tried out the DKL Schneider 45mm f2.8 Xenar today on the 1D III. I had a much easier time with it, due to a number of factors. First the weather was much better today. Second the lens is one stop brighter than the Tele-Arton, and lastly, the split screen on the 1D III really helped.
The Xenar has soft corners until it's significantly stopped down. Not sure if this is a copy variance. I have another one of these so perhaps I should try the other one and see. The center of the the image, however, is very sharp on larger apertures. Again, the colour from the Schneider lenses are fantastic. As I mentioned before, the 1 meter minimum focusing distance is very long for a normal lens. But then again, most very old lenses have this attribute. Perhaps it was harder to design a lens to focus closer.
The last one of the Schneider I have not tried yet, is the Tele-Arton 85mm f4. I am sure it would perform very close to that of the Tele-Arton 90mm f4. We will see.
Autumn in the city -- 1D Mark III & Schneider-Kreuznach Xenar 45mm f2.8. Larger Picture.
Frosty Leaves -- 1D Mark III & Schneider-Kreuznach Xenar 45mm f2.8. Larger Picture.
More Autumn Colours -- 1D Mark III & Schneider-Kreuznach Xenar 45mm f2.8. Larger Picture.