Portrait At-a-Glance Comparison (Upper Body Framing)
| Optical & Portrait Metric | Leica Noctilux-M 50mm f/0.95 ASPH. | Leica APO-Summicron-M 50mm f/2 ASPH. | 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) | 38° | 39° | Identical 38° horizontal background view behind the subject. |
| Entrance Pupil Diameter | 52.6 mm (f/0.95) | 25.0 mm (f/2) | Distant background blur discs are 110% larger on the Leica Noctilux-M 50mm f/0.95 ASPH.. |
| Corner Bokeh Roundness (90% Field) | 46% (-1.6 EV) | 91% (-0.3 EV) | Leica APO-Summicron-M 50mm f/2 ASPH. keeps significantly rounder bokeh balls into the corners wide open (91% vs. 46% roundness). |
| Effective Focal Length (Breathing) | 51.7 mm (+3.4%) | 50.6 mm (+1.3%) | At 2.0 m, Leica Noctilux-M 50mm f/0.95 ASPH. frames like a 51.7 mm lens while Leica APO-Summicron-M 50mm f/2 ASPH. frames like a 50.6 mm lens. |
| Depth of Field (Sharp Zone) | 14 cm (1.95 m – 2.08 m) | 29 cm (1.88 m – 2.17 m) | The Leica Noctilux-M 50mm f/0.95 ASPH. has a 53% thinner focus zone (14 cm vs. 29 cm)—requiring more precise eye focus. |
| Minimum Focus Distance | 1 m | 0.7 m | Leica APO-Summicron-M 50mm f/2 ASPH. focuses 30 cm closer (1 m vs. 0.7 m) for tighter close-ups. |