The Mamiya 300mm f/5.6 is an unusually compact long telephoto, maintaining a 58mm filter size common to most Mamiya 645 lenses.
Mamiya lenses are quality controlled at all stages. They are engineered for professional use. Mamiya manufactures its own glass and coats the lens elements using Mamiya's proprietary multi-coating process, increasing light transmission, dramatically reducing flare, and ensuring crisp, clean whites and vibrant natural colors.
| Equivalent 35mm Focal Length | 186mm |
| Angle of View @ Infinity | 13° |
| Filter Size | 58mm |
| Elements/Groups | 6/5 |
| Shutter | N/A |
| f/Stop Range | f/5.6 - 32 |
| Flash Synchronization | N/A |
| Minimum Focus Distance | 4m (11.12 ft.) |
| Dimensions | 164 x 70mm (6.46 x 2.78") L x W |
| Weight | 710g (24.96 ozs.) |