Confronto ritratto a colpo d’occhio (mezzo busto)
| Optical & Portrait Metric | Leica Summilux-M 35mm f/1.4 ASPH. | Leica Summilux-M 35mm f/1.4 Pre-ASPH | What It Means in Practice |
|---|---|---|---|
| Upper-Body Working Distance | 1.42 m | 1.42 m | Identical working distance—both frame an upper-body portrait from the exact same spot. |
| Effective Focal Length (Breathing) | 35.4 mm (+1.1%) | 35.5 mm (+1.6%) | At 1.4 m, Leica Summilux-M 35mm f/1.4 ASPH. frames like a 35.4 mm lens while Leica Summilux-M 35mm f/1.4 Pre-ASPH frames like a 35.5 mm lens. |
| Depth of Field (Sharp Zone) | 20 cm (1.33 m – 1.53 m) | 20 cm (1.33 m – 1.53 m) | Both lenses deliver the exact same 20 cm sharp focus zone. |
| Entrance Pupil Diameter | 25.0 mm (f/1.4) | 25.0 mm (f/1.4) | Nearly identical distant background blur size at equal framing. |
| Minimum Focus Distance | 0.7 m | 1 m | Leica Summilux-M 35mm f/1.4 ASPH. focuses 30 cm closer (0.7 m vs. 1 m) for tighter close-ups. |
| Patent Prescription | US5161060A (9/5) | FR1233449A (7/5) | Published optical prescriptions traced in the 3D simulator above. |