The Jupiter-3 50mm f/1.5 is a fast standard prime derived from the Zeiss Sonnar optical lineage, produced in the Soviet Union for rangefinder cameras. It was made in Leica Thread Mount (LTM/M39) and Contax/Kiev rangefinder mount variants, and was designed as a general-purpose low-light standard lens for 35mm film rangefinders.

At recent UK auction, hammer prices for the Jupiter-3 have been modest, with recorded results of £88 in October 2024 and £100 in November 2025, giving a median around £94. These figures are wholesale saleroom results and do not include buyer's or seller's commission, so retail dealer asking prices today in 2026 typically sit well above this level, and cleaner early Contax-mount or well-collimated LTM copies tend to sell for more than rough examples.