You are probably saying "Camera Traders description guy, the A. Scacht Ulm R Travegon 35mm f3.5 is an Exakta lens, not a Leica M lens, you dummy." Well, you are half right: this lens was originally for the Exakta mount. In fact, the lens has an Exakta mount on it as we speak! But It's been modified... somehow... to focus to infinity on an M mount adapter, which is included. No RF coupling, of course, but image quality is quite good. Needless to say, this isn't going to reach infinity on an Exakta anymore, so that's why the title says "for Leica M". Glass is good overall, with light edge haze; aperture blades are slightly oil, which has no effect on function. Cosmetics are very good, with light wear.