The Mamiya 645 AF 55mm f/2.8 is an autofocus moderate wide-angle prime for the Mamiya 645 AF system, covering the 6x4.5cm medium-format frame. Designed for use on the original 645 AF body and later AFD/AFD II/AFD III cameras, it suits landscape, environmental portrait and general reportage work where a slightly wider-than-normal field of view is wanted.

UK auction data on this lens is thin: a single hammer result in the saleroom in May 2025 saw a copy sell for £40, which is the only verified price point we have to anchor what the 55mm f/2.8 is currently worth in 2026. With just one sale on file, that figure should be read as an indicative low rather than a reliable median, and clean copies with boxes or matched body kits can fetch more at auction. As ever, hammer prices exclude buyer's and seller's commission, so the all-in cost to a winning bidder is higher than the headline number.