Confronto ritratto a colpo d’occhio (mezzo busto)
| Optical & Portrait Metric | Sony FE 50mm F1.8 | Sony Sonnar FE 55mm F1.8 ZA | What It Means in Practice |
|---|---|---|---|
| Upper-Body Working Distance | 2.01 m | 2.21 m | The Sony Sonnar FE 55mm F1.8 ZA requires 0.2 m more room behind you for the same subject size. |
| Effective Focal Length (Breathing) | 50.8 mm (+1.7%) | 54.2 mm (-1.5%) | Sony FE 50mm F1.8 frames like 50.8 mm (+1.7%) at 2.0 m; Sony Sonnar FE 55mm F1.8 ZA frames like 54.2 mm (-1.5%) at 2.2 m. |
| Depth of Field (Sharp Zone) | 26 cm (1.89 m – 2.15 m) | 26 cm (2.09 m – 2.35 m) | Both lenses deliver the exact same 26 cm sharp focus zone. |
| Entrance Pupil Diameter | 27.8 mm (f/1.8) | 30.6 mm (f/1.8) | Distant background blur discs are 10% larger on the Sony Sonnar FE 55mm F1.8 ZA. |
| Minimum Focus Distance | 0.45 m | 0.5 m | Sony FE 50mm F1.8 focuses 5 cm closer (0.45 m vs. 0.5 m) for tighter close-ups. |
| Patent Prescription | JP S57-108817A (6/5) | US20150092100A1 (7/5) | Published optical prescriptions traced in the 3D simulator above. |