View angle (diagonal/horizontal/vertical) Full-frame (24 x 36 mm) | 74°/65°/46° |
| Number of lenses/assemblies | 9/6 |
| Number of aspherical surfaces | 1 |
| Position of the entrance pupil before the bayonet | 12.7mm |
| Focus range | Live View: 0.4m to ∞, rangefinder: 0.7m to ∞ |
| Focus Scale | Combined scale meter (m)/foot (ft) |
| Smallest object field | Full-frame: 272 x 408 mm |
| Reproduction Ratio | 1:11.3 |
| Aperture Setting/Function | Click-stop diaphragm with half-increment lock settings |
| Smallest aperture | 16 |
| Number of aperture blades | 10 |
| Bayonet | Leica M bayonet with 6-bit encoding |
| Filter thread | E46 (46mm) |
| Lens hood | Pull-out (circular) |
| Length | Approx. 55mm |
| Diameter | Approx. 58mm |
| Weight | Approx. 275 grams |
| Scope of Delivery | Leica Summicron-M 28 f/2 ASPH., Safari – Leather Case – Front Cap – Rear Cap – Instructions |