Confronto ritratto a colpo d’occhio (mezzo busto)
| Optical & Portrait Metric | Leica Summilux-M 28mm f/1.4 ASPH. | Leica Summicron-M 28mm f/2 ASPH. | What It Means in Practice |
|---|---|---|---|
| Upper-Body Working Distance | 1.15 m | 1.15 m | Identical working distance—both frame an upper-body portrait from the exact same spot. |
| Effective Focal Length (Breathing) | 28.1 mm (+0.2%) | 27.3 mm (-2.5%) | At 1.1 m, Leica Summilux-M 28mm f/1.4 ASPH. frames like a 28.1 mm lens while Leica Summicron-M 28mm f/2 ASPH. frames like a 27.3 mm lens. |
| Depth of Field (Sharp Zone) | 21 cm (1.05 m – 1.26 m) | 30 cm (1.02 m – 1.31 m) | The Leica Summilux-M 28mm f/1.4 ASPH. has a 31% thinner focus zone (21 cm vs. 30 cm)—requiring more precise eye focus. |
| Entrance Pupil Diameter | 20.0 mm (f/1.4) | 14.0 mm (f/2) | Distant background blur discs are 43% larger on the Leica Summilux-M 28mm f/1.4 ASPH.. |
| Minimum Focus Distance | 0.7 m | 0.7 m | Both lenses share the same 0.7 m close-focus limit. |
| Patent Prescription | US20160070086A1 (10/7) | US20160266350A1 (11/9) | Published optical prescriptions traced in the 3D simulator above. |