The Mamiya 6 150mm f/4.5 is the long telephoto option in the bayonet-mount lens lineup for the Mamiya 6 rangefinder system, a 6x6 medium-format folding-strut camera produced in the 1990s. Designed as a portrait and short-tele tool to complement the standard 75mm and wide 50mm, it is the longest focal length offered for the system.

Auction data for this lens is thin: a single UK saleroom result from September 2023 saw a copy fetch a hammer price of £138, with no further verified results to establish a true range. As of 2026 that figure is the only firm reference point for what the lens is worth at wholesale auction level, and individual condition, packaging and rangefinder coupling accuracy will move the price materially either way. Buyers wanting to know how much a Mamiya 6 150mm f/4.5 sells for should treat this single hammer result as indicative rather than definitive and watch further sales before committing.