Carl Zeiss Opton Sonnar 1:2 f=50mm T Nr 823058 Camera lens

In this auction, a very nice and well-functioning Zeiss - Opton Sonnar 1:2 f=50mm T.
This prime lens captures razor-sharp photos of very high quality. It features a Contax RF bayonet mount for Contax IIa and IIIa (these are the post-war rangefinder models of Contax). Additionally, the lens also fits KIEV rangefinder cameras.
There are some attached photos where the lens is mounted on my Contax IIIa and KIEV 4a. The cameras depicted are illustrative and are not part of the delivery. Additionally, some black-and-white photos have been added, which I recently took with this lens using my Contax IIIa camera.
As mentioned, it is a lens in very good condition, with absolutely scratch-free and clear glass. The lens dates from the early 1950s. Given its age, there are likely some small dust particles inside the lens, but these are not visible to the naked eye and are not noticeable in the photos.
Good luck bidding on this beautiful Carl Zeiss lens that rivals the Leica, Nikon, and Canon lenses from the era when rangefinder cameras were very popular!