Portrait At-a-Glance Comparison (Upper Body Framing)
| Optical & Portrait Metric | Nikon NIKKOR Z 50mm f/1.4 | Nikon NIKKOR Z 50mm f/1.8 S | 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) | 40° | 41° | Identical 40° horizontal background view behind the subject. |
| Entrance Pupil Diameter | 35.7 mm (f/1.4) | 27.8 mm (f/1.8) | Distant background blur discs are 28% larger on the Nikon NIKKOR Z 50mm f/1.4. |
| Corner Bokeh Roundness (90% Field) | 58% (-1.2 EV) | 69% (-0.5 EV) | Nikon NIKKOR Z 50mm f/1.8 S keeps significantly rounder bokeh balls into the corners wide open (69% vs. 58% roundness). |
| Effective Focal Length (Breathing) | 49.0 mm (-2.0%) | 48.6 mm (-2.9%) | At 2.0 m, Nikon NIKKOR Z 50mm f/1.4 frames like a 49.0 mm lens while Nikon NIKKOR Z 50mm f/1.8 S frames like a 48.6 mm lens. |
| Depth of Field (Sharp Zone) | 20 cm (1.92 m – 2.12 m) | 26 cm (1.89 m – 2.15 m) | The Nikon NIKKOR Z 50mm f/1.4 has a 22% thinner focus zone (20 cm vs. 26 cm)—requiring more precise eye focus. |
| Minimum Focus Distance | 0.37 m | 0.4 m | Nikon NIKKOR Z 50mm f/1.4 focuses 3 cm closer (0.37 m vs. 0.4 m) for tighter close-ups. |