This adapter allows Mamiya M645 Lenses to be used on any camera that can use a M42 mount adapter.
In addition, the adapter allows shifts up to 15mm and tilts up to 10 degrees, making any M45 lens a tilt/shift lens. Adapters to fit Pentacon 6, Bronica, Hasselblad and Pentax 6X7 lenses to the Mirex adapter are available.

Mamiya 645 lenses are reasonably priced and widely available and include a 35mm wide angle, a f/1.9 80mm, a floating element 80mmm macro, 120mm apo macro lens, and a 55-110mm zoom.