{"overview":"The Mamiya Press 250mm f\/5 is a long telephoto lens for the Mamiya Press and Universal Press rangefinder system, covering the 6x7 and 6x9 roll-film formats. It was the longest focal length offered for the Press line, intended for portrait, sports and landscape work where the standard 90mm and 100mm lenses lacked reach.","market_narrative":"At UK auction the 250mm f\/5 trades quietly: the most recent hammer result we have on file is £101 in August 2024, which gives a working guide to what a usable copy sells for at saleroom level today. With only a single verified UK auction hammer result on record, that figure should be read as a single data point on wholesale value rather than a firm market median, and clean examples with matching finder masks can price higher in dealer channels than the auction wholesale level suggests.","buying_guide":"Inspect the front and rear groups for fungus and haze, as the long barrel and slow f\/5 aperture can mask internal cloudiness in normal handling. Check the leaf shutter fires cleanly at all speeds and that the aperture blades are dry and snappy with no oil migration, look for coating cleaning marks on the large front element, and confirm the focus helicoid is smooth rather than dry or sticky. Buyers should also check that the correct external rangefinder cam and bright-line finder mask are present, since a 250mm without its finder is awkward to use on a Press body.","specs":"Sold as part of the Mamiya Press \/ Universal Press lens range, the 250mm f\/5 is a leaf-shutter telephoto for medium-format rangefinder use; further detailed specifications are not included in the supplied data.","faq":[{"q":"What is a Mamiya Press 250mm f\/5 worth at UK auction?","a":"The one verified UK auction hammer price we have on file is £101 from August 2024, so as a rough guide a usable copy sells for around the £100 mark at wholesale saleroom level."},{"q":"How much does a Mamiya Press 250mm f\/5 sell for compared with shorter Press lenses?","a":"The 250mm is a niche long telephoto and tends to trade at a lower price and with thinner demand than the standard 90mm and 100mm Press lenses, which see more frequent hammer activity."},{"q":"Will the 250mm f\/5 fit a Mamiya RB67 or Mamiya 7?","a":"No. It is a Press-mount lens for the Mamiya Press, Universal Press and Super 23 bodies and is not interchangeable with RB67, RZ67 or Mamiya 6\/7 systems."},{"q":"Does the value depend on having the original finder mask?","a":"Yes — a complete outfit with the matching bright-line finder mask and rangefinder cam is more usable and typically holds value better than a bare lens."}],"confidence":30,"reasoning":"Only one verified UK auction sale and no SPECS or variant data were supplied, so pricing commentary rests on a single data point and technical detail is intentionally limited."}