This is a later Black Jupiter-8 50mm F2 in Leica Thread Mount. I optimized this lens for close-up and wide-open use for the Leica standard. It also has a fresh Lube job. Optics are very clean, a little oil on aperture blades, but has no affect on operation. A little wear to the paint, as shown. Wide-Open and close-up on the Leica M8: 100% crop (pixel peeping): 100% crop: focus optimized for close-up and wide-open, which required a custom shim job. Color at F2: Infinity: F2: Infinity at F4: Russian lenses are not made to the Leica standard, and must be adjusted for use. $70 Shipped in the US or Canada via 1st Class, $75 anywhere else shipped International First Class. $85 shipped International Priority Mail. Paypal, Personal Check, Money order. I reserve the right to hold shipment until check/MO clear.