[j. white]

I see... Apochromatic correction, that is the ability to resolve all color frequencies equally on the film/sensor plane, generally becomes important only with longer focal lengths. In fact, I cannot think of a single 50mm lens from any manufacturer with an APO designation. In this regard, there should be no dispute between the capabilities of the two lenses.

From what I've read, the 75 APO Summicron is derived from the design of the current 50 Summilux and both are reported to draw in a similar, highly corrected fashion at all apertures and focusing distances. I can speak from experience with the 50 - it is a terrific lens.

Enjoy your time with the system. It is both challenging and rewarding.


-J.