{"overview":"The 50mm f\/3.5 Zenzanon-S is a wide-angle prime lens for the Zenza Bronica SQ-series 6x6 medium-format SLR system, fitting the bayonet mount used by the SQ, SQ-A, SQ-Ai and SQ-B bodies. On the 6x6 format the 50mm focal length gives a moderately wide field of view, and the lens was designed for landscape, architectural and environmental work where coverage matters more than maximum speed.","market_narrative":"UK auction activity for this lens is thin, with the only verified hammer result in our records selling for £25 at a UK saleroom in late 2025. That figure is a wholesale auction-hammer price rather than a dealer asking price, so retail value for a clean, fungus-free copy with caps and a working aperture would be expected to sit higher in 2026, though buyers should treat a single data point with caution when judging what one is truly worth today.","buying_guide":"Inspect the front and rear elements under a strong light for fungus, haze and cleaning marks, as wide-angle Zenzanon optics often show internal haze after long storage. Work the aperture blades through the full range to confirm they snap cleanly with no oil migration, check the focus helicoid for smooth, even travel without grinding or stiffness, and look for separation rings around the cemented groups and chips in the rear bayonet flange.","specs":"Specifications confirmed from the supplied data are limited to the 50mm focal length and f\/3.5 maximum aperture, with the Zenzanon-S designation indicating the SQ-series leaf-shutter bayonet mount.","faq":[{"q":"What is a Bronica 50mm f\/3.5 Zenzanon-S worth in the UK?","a":"Based on the limited UK auction data available, a copy sold for £25 hammer in November 2025; with only one verified sale on file, this should be read as an indicative auction-floor price rather than a firm market value."},{"q":"How much does a 50mm Zenzanon-S sell for at auction?","a":"Recent UK saleroom evidence shows a price of £25 at hammer, which excludes buyer's premium and reflects wholesale rather than retail levels."},{"q":"What camera does the 50mm f\/3.5 Zenzanon-S fit?","a":"The S suffix denotes the Bronica SQ bayonet, so it mounts on SQ-series 6x6 bodies such as the SQ, SQ-A, SQ-Ai and SQ-B."},{"q":"Is the 50mm Zenzanon-S a wide-angle lens?","a":"Yes — on the 6x6 format covered by the SQ system, 50mm gives a moderately wide angle of view, making it a common choice for landscape and interior work."}],"confidence":35,"reasoning":"Only one verified sale and no SPECS or variant data were provided, so pricing and technical claims are necessarily limited."}