{"overview":"The Mamiya Sekor Z 350mm f\/5.6 is a long telephoto lens for the Mamiya RZ67 medium-format SLR system, mounting via the RZ67 bayonet and intended for portrait, wildlife and landscape work where extra reach on the 6x7 frame is required. It sits at the long end of the RZ67 Sekor Z range and was aimed at studio and location professionals working with the RZ67 Pro, Pro II and Pro IID bodies.","market_narrative":"Evidence for current value is thin: the only verified UK auction hammer result on file is a single £150 sale from April 2024, so today in 2026 a working copy is worth roughly that figure at saleroom level, with both the median and the recorded range sitting at £150. Because this is a wholesale auction price rather than a dealer asking figure, retail-clean examples typically sell for more once a specialist has serviced and warranted them, and condition, glass clarity and the presence of caps and hood are the main factors that move the price up or down.","buying_guide":"Inspect the front and rear groups carefully for fungus and haze, which are common in long Sekor Z optics that have spent years in humid storage, and angle the lens against a bright light to check coating scratches and any signs of element separation around the cemented groups. Work the aperture blades through their full range looking for oil migration, then turn the focus helicoid end to end to confirm it is smooth rather than stiff or sticky, and verify the shutter cocking linkage at the rear engages cleanly with the RZ67 body since the leaf shutter sits inside the lens.","specs":"Recorded specifications are limited to focal length and maximum aperture: 350mm at f\/5.6, in Mamiya RZ67 bayonet mount with an integral leaf shutter typical of the Sekor Z series.","faq":[{"q":"How much does a Mamiya RZ67 350mm f\/5.6 sell for at UK auction?","a":"The single verified hammer result on record is £150 from April 2024, so a comparable user-grade copy sells for around that price at auction today, before any buyer's premium."},{"q":"What is a Mamiya RZ67 350mm f\/5.6 worth in 2026?","a":"On the limited data available, the lens is worth roughly £150 at UK saleroom level for a functional copy, with cleaner glass and complete accessories pushing the price modestly higher in retail channels."},{"q":"Is the 350mm f\/5.6 compatible with all RZ67 bodies?","a":"Yes, it uses the standard RZ67 bayonet and works on the RZ67 Pro, Pro II and Pro IID bodies provided the in-lens leaf shutter cocks cleanly with the body's drive coupling."},{"q":"What should I check before buying one?","a":"Prioritise glass condition (fungus, haze, separation), aperture blades free of oil, a smooth focus helicoid and a leaf shutter that fires at all speeds; these are the faults most likely to reduce the value of an otherwise tidy copy."}],"confidence":30,"reasoning":"Only one sales record is on file and no specs or variant facts were supplied, so pricing and technical detail are necessarily limited."}