{"overview":"The GOMZ Industar-7 is a Soviet-era 105mm f\/3.5 medium-format lens produced by the GOMZ optical works in Leningrad. Designed primarily for large-format and process photography of its period, it is a manual-focus optic that today appeals mainly to collectors of early Soviet glass and users adapting older lenses for studio or experimental work.","market_narrative":"Auction evidence for the Industar-7 is thin: a single recorded UK saleroom result fetched £162 at hammer in March 2023, which currently anchors the only data point for what this lens is worth in the auction market today. With just one sale on file, there is no meaningful range or median to report in 2026, and any premium for boxed or unusually clean examples cannot be quantified from the available record. Buyers should treat this hammer figure as wholesale-level guidance rather than a retail price.","buying_guide":"Given the lens's age, inspect carefully for internal fungus, haze on the cemented groups, and oil migration onto the aperture blades, all of which are common on Soviet optics from this era. Check the focus helicoid for stiffness or dried grease, look for coating cleaning marks and edge separation, and confirm the iris opens and closes cleanly across its full range.","specs":"Recorded specifications are limited to the model designation: a 105mm focal length at a maximum aperture of f\/3.5, branded GOMZ Industar-7.","faq":[{"q":"What is a GOMZ Industar-7 105mm f\/3.5 worth at auction?","a":"The only verified UK auction result on file sells for £162 at hammer (March 2023), so that figure is the best current indicator of value, though a single sale is a narrow basis for pricing."},{"q":"How much does a 105mm f\/3.5 Industar-7 sell for today?","a":"With one recorded hammer price of £162, expect clean copies to trade in that broad area at UK auction, while dealer retail prices will typically sit higher once commissions and margins are added."},{"q":"What should I check before buying one?","a":"Prioritise glass clarity (no fungus, haze, or separation), smooth focus action, and clean, dry aperture blades, as these are the most common faults on Soviet lenses of this vintage."}],"confidence":25,"reasoning":"Only one sales record and no detailed specs or variant data are provided, so confidence is low per the rules."}