The Mamiya 645 Pro is a medium format SLR for 6x4.5cm roll film, introduced in 1985 as part of Mamiya's modular 645 system. When new it was positioned as a professional studio and location camera with interchangeable backs, finders and screens.

At UK auction in 2024 the 645 Pro hammered at £320 and £360, giving a tight £320–£360 hammer range with a midpoint around £340 — wholesale saleroom levels rather than retail dealer prices. As of 2026 the model still sells for working-camera money, with what a clean kit is worth depending heavily on which prism, back and lens are included.