Porównanie portretowe w skrócie (popiersie)
| Optical & Portrait Metric | Leica APO-Summicron-M 50mm f/2 ASPH. | Leica Summicron-M 50mm f/2 | What It Means in Practice |
|---|---|---|---|
| Upper-Body Working Distance | 2.01 m | 2.01 m | Identical working distance—both frame an upper-body portrait from the exact same spot. |
| Effective Focal Length (Breathing) | 50.6 mm (+1.3%) | 51.1 mm (+2.3%) | At 2.0 m, Leica APO-Summicron-M 50mm f/2 ASPH. frames like a 50.6 mm lens while Leica Summicron-M 50mm f/2 frames like a 51.1 mm lens. |
| Depth of Field (Sharp Zone) | 29 cm (1.88 m – 2.17 m) | 29 cm (1.88 m – 2.17 m) | Both lenses deliver the exact same 29 cm sharp focus zone. |
| Entrance Pupil Diameter | 25.0 mm (f/2) | 25.0 mm (f/2) | Nearly identical distant background blur size at equal framing. |
| Minimum Focus Distance | 0.7 m | 0.7 m | Both lenses share the same 0.7 m close-focus limit. |
| Patent Prescription | US4123144A (6/4) | US4123144A (6/4) | Published optical prescriptions traced in the 3D simulator above. |