Portrait At-a-Glance Comparison (Upper Body Framing)
| Optical & Portrait Metric | Sony Distagon FE 35mm F1.4 ZA | Sony Sonnar FE 35mm F2.8 ZA | 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) | 34.9 mm (-0.4%) | 34.3 mm (-1.9%) | At 1.4 m, Sony Distagon FE 35mm F1.4 ZA frames like a 34.9 mm lens while Sony Sonnar FE 35mm F2.8 ZA frames like a 34.3 mm lens. |
| Depth of Field (Sharp Zone) | 20 cm (1.33 m – 1.53 m) | 41 cm (1.24 m – 1.66 m) | The Sony Distagon FE 35mm F1.4 ZA has a 51% thinner focus zone (20 cm vs. 41 cm)—requiring more precise eye focus. |
| Entrance Pupil Diameter | 25.0 mm (f/1.4) | 12.5 mm (f/2.8) | Distant background blur discs are 100% larger on the Sony Distagon FE 35mm F1.4 ZA. |
| Minimum Focus Distance | 0.3 m | 0.35 m | Sony Distagon FE 35mm F1.4 ZA focuses 5 cm closer (0.3 m vs. 0.35 m) for tighter close-ups. |
| Patent Prescription | US4806003A (10/8) | JP2015-041012A (7/5) | Published optical prescriptions traced in the 3D simulator above. |