This item was unearthed from the warehouse of my father, who enjoyed repairing cameras as a hobby. Specification markings: The engravings "**1:1.5**" and "**F=5CM**" are present. This indicates an open aperture value of F1.5 and a focal length of 5cm (50mm). Jupiter-3 The Jupiter-3 is a lens copied from the German Carl Zeiss "Sonnar" 50mm F1.5 lens. It was manufactured by camera manufacturers in the former Soviet Union from the 1950s to the 1980s. The rear cap is confirmed to be engraved with "LEICA". Rear cap and front cap included. As it was made in 1954, it is likely an early model. As a complete novice when it comes to cameras, I cannot judge how accurate this product description is. Rear cap and front cap included. The focusing ring turns left and right. ⤴︎The above is an AI assessment. I am a complete novice when it comes to cameras. The images/photos are everything. Please take a good look at the photos until the end. Please bid/purchase only if you understand.