{"overview":"The Mamiya 645 80mm f\/2.8 is the standard normal lens for the Mamiya 645 medium format system, covering a 6x4.5cm frame with a field of view roughly equivalent to a 50mm on full-frame 35mm. It was designed as the kit lens for the 645 line and is the most commonly encountered focal length in the system, used for general, portrait and reportage work.","market_narrative":"Auction data for the 645 80mm f\/2.8 is thin: a single UK saleroom hammer result in October 2025 closed at £126, which is the only verified data point we hold as of 2026. Because this is a wholesale auction-hammer price (excluding buyer's and seller's commission) rather than a dealer asking price, retail value at a shop will typically sit higher; with only one sale on file, treat £126 as an indicative rather than a representative figure for what the lens sells for.","buying_guide":"Inspect the front and rear elements under a strong light for fungus, haze and cleaning marks, and check the aperture blades for oil — a common failure on older Sekor C examples that causes sluggish stop-down. Work the focus ring through its full travel to confirm it is smooth rather than stiff or gritty, and look for any signs of element separation (rainbow edges) or coating scratches. Confirm the electrical contacts and aperture coupling are clean if the lens will be used on a later autofocus 645 body.","specs":"Standard 80mm focal length at f\/2.8 maximum aperture for the Mamiya 645 manual-focus mount; further specifications were not supplied in the source data and have been omitted.","faq":[{"q":"What is a Mamiya 645 80mm f\/2.8 worth today?","a":"Based on the single UK auction hammer result we hold from October 2025, a copy sold for £126; with so little data the realistic worth sits around that level for a clean, working example, though retail prices at dealers are typically higher."},{"q":"How much does a Mamiya 645 80mm f\/2.8 sell for at auction?","a":"The only verified UK saleroom price in our records is £126, achieved in late 2025 — a useful reference point but not yet a reliable median given the limited sample."},{"q":"Is the 645 80mm f\/2.8 a good value standard lens?","a":"At the price level recorded it offers strong value as the native standard lens for the Mamiya 645 system, provided the example is free of fungus, haze and oil on the aperture blades."},{"q":"Will this lens fit all Mamiya 645 bodies?","a":"It is built for the Mamiya 645 mount and will mount on the manual-focus 645 bodies; compatibility with later autofocus AFD-series bodies depends on the specific variant, so confirm version markings before buying."}],"confidence":30,"reasoning":"Only one sales record and no SPECS, variants or facts were provided, so market commentary and specification detail are necessarily limited."}