Up for auction is the Zeiss-Opton 35mm f/2.8 Biogon. This lens was originally in Contax rangefinder mount, and now has been converted to Leica M mount. The original rangefinder coupler was removed and replaced with a coupler for Leica M. The mount used is a Pixco Nikon/Contax RF to Leica M mount. The adapter has been modified to bring up the 35mm frame lines on your Leica M camera. This is a true artisan lens with impressive center sharpness even wide open..., rendering a beautiful smooth bokeh to your background. Check out the photos I’ve attached for performance at f/2.8, f/4 and f/5.6.The lens body is in overall excellent condition. The lens elements are in great shape, free of haze, fungus or scratches. Aperture blades move smoothly and accurately.This is a wonderful niche lens for your Leica M system or mirrorless cameras with Leica M mount. This lens comes to you with a Heliopan protective UV filter and a generic Leica back lens cap.Bid with confidence. I have a 100% positive rating. U.S. buyers and shipping to U.S. addresses only. Thanks!On Aug-17-20 at 15:04:36 PDT, seller added the following information:For those of you who think you have seen this auction before, you are correct. It was listed several weeks ago, but the winning bidder had an out of country address. That auction, as this one, is for U.S. bidders only, so the winning bidder was cancelled. It was offered as a second chance to the second highest bidder, but no response. So, here it is again with no reserve to let today's market determine the value.