Porównanie portretowe w skrócie (popiersie)
| Optical & Portrait Metric | Leica Summilux-M 50mm f/1.4 | Leica APO-Summicron-M 50mm f/2 ASPH. | 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) | 51.0 mm (+1.9%) | 50.6 mm (+1.3%) | At 2.0 m, Leica Summilux-M 50mm f/1.4 frames like a 51.0 mm lens while Leica APO-Summicron-M 50mm f/2 ASPH. frames like a 50.6 mm lens. |
| Depth of Field (Sharp Zone) | 20 cm (1.92 m – 2.12 m) | 29 cm (1.88 m – 2.17 m) | The Leica Summilux-M 50mm f/1.4 has a 30% thinner focus zone (20 cm vs. 29 cm)—requiring more precise eye focus. |
| Entrance Pupil Diameter | 35.7 mm (f/1.4) | 25.0 mm (f/2) | Distant background blur discs are 43% larger on the Leica Summilux-M 50mm f/1.4. |
| Minimum Focus Distance | 1 m | 0.7 m | Leica APO-Summicron-M 50mm f/2 ASPH. focuses 30 cm closer (1 m vs. 0.7 m) for tighter close-ups. |
| Patent Prescription | US3291553A (7/5) | US4123144A (6/4) | Published optical prescriptions traced in the 3D simulator above. |