Confronto ritratto a colpo d’occhio (mezzo busto)
| Optical & Portrait Metric | Sony FE 20mm F1.8 G | Sony FE 24mm F1.4 GM | What It Means in Practice |
|---|---|---|---|
| Upper-Body Working Distance | 0.84 m | 0.99 m | The Sony FE 24mm F1.4 GM requires 0.2 m more room behind you for the same subject size. |
| Effective Focal Length (Breathing) | 19.8 mm (-0.8%) | 24.2 mm (+0.6%) | Sony FE 20mm F1.8 G frames like 19.8 mm (-0.8%) at 0.8 m; Sony FE 24mm F1.4 GM frames like 24.2 mm (+0.6%) at 1.0 m. |
| Depth of Field (Sharp Zone) | 28 cm (72 cm – 100 cm) | 21 cm (90 cm – 1.11 m) | The Sony FE 24mm F1.4 GM has a 25% thinner focus zone (28 cm vs. 21 cm)—requiring more precise eye focus. |
| Entrance Pupil Diameter | 11.1 mm (f/1.8) | 17.1 mm (f/1.4) | Distant background blur discs are 54% larger on the Sony FE 24mm F1.4 GM. |
| Minimum Focus Distance | 0.19 m | 0.24 m | Sony FE 20mm F1.8 G focuses 5 cm closer (0.19 m vs. 0.24 m) for tighter close-ups. |
| Patent Prescription | WO2020213337A1 (14/12) | WO2019073744A1 (13/10) | Published optical prescriptions traced in the 3D simulator above. |