Portrait At-a-Glance Comparison (Upper Body Framing)
| Optical & Portrait Metric | Nikon NIKKOR Z 135mm f/1.8 S Plena | Sony FE 135mm F1.8 GM | What It Means in Practice |
|---|---|---|---|
| Upper-Body Working Distance | 5.40 m | 5.40 m | Identical working distance—both frame an upper-body portrait from the exact same spot. |
| Background Field of View (Compression) | 16° | 16° | Identical 16° horizontal background view behind the subject. |
| Entrance Pupil Diameter | 75.0 mm (f/1.8) | 75.0 mm (f/1.8) | Nearly identical distant background blur size at equal framing. |
| Corner Bokeh Roundness (90% Field) | 100% (0.0 EV) | 61% (-0.9 EV) | Nikon NIKKOR Z 135mm f/1.8 S Plena keeps significantly rounder bokeh balls into the corners wide open (100% vs. 61% roundness). |
| Effective Focal Length (Breathing) | 130.2 mm (-3.6%) | 130.8 mm (-3.1%) | At 5.4 m, Nikon NIKKOR Z 135mm f/1.8 S Plena frames like a 130.2 mm lens while Sony FE 135mm F1.8 GM frames like a 130.8 mm lens. |
| Depth of Field (Sharp Zone) | 25 cm (5.28 m – 5.53 m) | 25 cm (5.28 m – 5.53 m) | Both lenses deliver the exact same 25 cm sharp focus zone. |
| Minimum Focus Distance | 0.82 m | 0.7 m | Sony FE 135mm F1.8 GM focuses 12 cm closer (0.82 m vs. 0.7 m) for tighter close-ups. |