Portrait At-a-Glance Comparison (Upper Body Framing)
| Optical & Portrait Metric | Sony FE 50mm F1.2 GM | Sony FE 50mm F1.8 | What It Means in Practice |
|---|---|---|---|
| Upper-Body Working Distance | 2.01 m | 2.01 m | Identical working distance—both frame an upper-body portrait from the exact same spot. |
| Background Field of View (Compression) | 39° | 39° | Identical 39° horizontal background view behind the subject. |
| Entrance Pupil Diameter | 41.7 mm (f/1.2) | 27.8 mm (f/1.8) | Distant background blur discs are 50% larger on the Sony FE 50mm F1.2 GM. |
| Corner Bokeh Roundness (90% Field) | 43% (-1.3 EV) | 78% (-0.5 EV) | Sony FE 50mm F1.8 keeps significantly rounder bokeh balls into the corners wide open (78% vs. 43% roundness). |
| Effective Focal Length (Breathing) | 50.7 mm (+1.5%) | 50.8 mm (+1.7%) | At 2.0 m, Sony FE 50mm F1.2 GM frames like a 50.7 mm lens while Sony FE 50mm F1.8 frames like a 50.8 mm lens. |
| Depth of Field (Sharp Zone) | 17 cm (1.93 m – 2.10 m) | 26 cm (1.89 m – 2.15 m) | The Sony FE 50mm F1.2 GM has a 33% thinner focus zone (17 cm vs. 26 cm)—requiring more precise eye focus. |
| Minimum Focus Distance | 0.4 m | 0.45 m | Sony FE 50mm F1.2 GM focuses 5 cm closer (0.4 m vs. 0.45 m) for tighter close-ups. |