| Lens | Leica Summicron-M 28mm f/2 ASPH. |
| View angle (diagonal/horizontal/vertical) Full-frame (24 × 36 mm) |
76°/65°/46° |
| Lens system | |
| Number of lenses/assemblies | 9/6 |
| Number of aspherical surfaces | 1 |
| Position of the entrance pupil before the bayonet | 12.7 mm |
| Focus range | 0.4 m to ∞ |
| Focusing | |
| Scale | Combined scale meter (m)/foot (ft) |
| Smallest object field | Full-frame: 272 x 408 mm |
| Largest scale | 1:11,3 |
| Diaphragm | |
| Setting/Function | Click-stop diaphragm with half-increment lock settings |
| Smallest aperture | 16 |
| Number of diaphragm blades | 10 |
| Bayonet | Leica M bayonet with 6-bit encoding |
| Filter thread | E46 |
| Lens hood | extendable |
| Dimensions | |
| Length | Approx. 55 mm |
| Diameter | Approx. 58 mm |
| Weight | Approx. 275 g |
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