BTW, the Summitar is my main LTM lens. It is great, IMO, for black and white or color. My only other Leitz lens is the Summar f/2.0. I use this one because it has a great look. It is not as sharp as the Summitar, but it has very unique "shakiness" to the out of focus areas that is just beautiful for some things. I hear that the Summicron is even sharper than the Summitar, but the Summitar has never left anything to be desired. I just wish that I could mount it on an SLR!!!