Mamiya 645 55mm f/2.8

Summary
Lens Composition          
8 elements in 6 groups
Angular Field ~65 degrees (35mm EFL: 34mm)
Minimum Focus 45cm/1.5ft
Focusing Action MF
f-stop Scale f/2.8-f/22, manual
Filter Size 58mm
Lens Hood N/A
Weight 305g/10.7oz
Dimensions 59x70mm/2.3x2.8"
Lens Case N/A