{"overview":"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.","market_narrative":"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.","buying_guide":"Inspect the front and rear groups carefully for fungus, haze and cleaning marks, as the soft coatings on Soviet-era glass scratch easily and internal haze is common on stored examples. Check the aperture blades for oil, confirm the focus helicoid turns smoothly without stiffness or play, and verify rangefinder coupling and collimation, since Jupiter-3 samples are notorious for being mis-shimmed and back-focusing on Leica bodies.","specs":"Key specifications from the supplied data are limited to a 50mm focal length and an f\/1.5 maximum aperture in the Jupiter-3 designation; mount, coating and element count are not provided in the source data.","faq":[{"q":"What is a Jupiter-3 50mm f\/1.5 worth at UK auction?","a":"Based on the two recorded UK hammer results, a Jupiter-3 has sold for between £88 and £100, so a typical value at auction is around £90–£100 before commission."},{"q":"How much does a 50mm f\/1.5 Jupiter-3 sell for today?","a":"Recent UK saleroom results from 2024 and 2025 put the hammer price at £88 and £100 respectively, though dealer retail prices are generally higher than these wholesale figures."},{"q":"Is the Jupiter-3 a good buy at this price?","a":"At a typical £88–£100 hammer, the Jupiter-3 is one of the more affordable fast 50mm rangefinder options, but the price assumes you accept the risk of haze, oily blades or poor collimation and budget for a possible service."}],"confidence":40,"reasoning":"Only two sales records are provided and the SPECS and variants arrays are empty, so confidence is capped per rule 8."}