Tessar Carl Zeiss Jena DDR Fixed/Prime F2.8 50mm Lens - Screw m42 Mount 

Legendary CARL ZEISS JENA DDR TESSAR F2.8 50mm Legendary Features CZJ DDR TESSAR 2.8 / 50: 1. Compactness. Indeed, Tessar is very comfortable and lightweight. 2. Sharpness. A distinctive feature of this lens. Tessar is very sharp. 3. It's all the same Carl Zeiss, the inscription is small but pleasant.