The Mamiya 645 55mm f/2.8 is a moderate wide-angle prime designed for the Mamiya 645 medium format SLR system. On the 6x4.5cm frame it gives a field of view roughly equivalent to a 35mm lens on full-frame 35mm, making it a common choice for landscape, environmental portraiture and reportage work on the 645 platform.

Hammer prices in the UK auction market are thin for this lens, with a single recorded sale at £160 in April 2024 setting the only firm reference point. As a wholesale saleroom result that excludes buyer's and seller's commission, it suggests what a clean copy is worth at trade level in 2026, though retail dealer asking prices typically sit higher. With only one data point, the figure should be read as indicative rather than a reliable median for what the lens sells for today.