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Fujifilm XF 16mm F2.8 R WR — Bokeh & Optical Ray-Tracing Simulator
Interactive 3D portrait ray-traced through the published US20200073096A1 optical prescription (10 elements in 8 groups, 4 aspherical) with a 5.7 mm entrance pupil and 0.17 m minimum focus.
Optical & Portrait Specifications (Upper Body Framing)
| Optical & Portrait Metric | Measured / Patent Value | What It Means in Practice |
|---|---|---|
| Patent Prescription | US20200073096A1 · 10 elements in 8 groups (4 aspherical) | Traced surface by surface in WebGL2 |
| Entrance Pupil Diameter | 5.7 mm (at f/2.8) | Controls distant background blur disc size |
| Corner Bokeh Roundness (90% Field) | 35% at f/2.8 · -3.7 EV | Mechanical vignetting (cat’s-eye vs. round corner highlights) |
| Background Field of View (Compression) | 77° horizontal | Width of the background room visible behind the subject |
| Upper-Body Working Distance | 1.01 m | Camera-to-subject distance for head-to-waist framing |
| Effective Focal Length (Breathing) | 14.9 mm (-6.7%) | Actual framing focal length at portrait distance |
| Depth of Field (Sharp Zone) | 71 cm (76 cm – 1.47 m) | Sharp zone at wide-open aperture |
| Minimum Focus Distance | 0.17 m | Closest focusing distance from the sensor |
Questions
How much background blur and corner cat's-eye does the Fujifilm XF 16mm F2.8 R WR produce?
Wide open at f/2.8, the Fujifilm XF 16mm F2.8 R WR has a 5.7 mm entrance pupil (16 mm ÷ 2.8) and 35% bokeh roundness in the 90% corner (-3.7 EV corner falloff). In an upper-body portrait at 1.01 m, the sharp depth-of-field zone spans 71 cm (76 cm to 1.47 m) with a 77° horizontal background angle of view.
Does the Fujifilm XF 16mm F2.8 R WR show focus breathing at portrait distance?
Based on patent US20200073096A1, tracing the focusing group at 1.01 m gives an effective framing focal length of 14.9 mm (-6.7% vs. the nominal 16 mm). You can toggle "Match subject size" in the simulator to see the framing shift live.
What optical design is inside the Fujifilm XF 16mm F2.8 R WR?
The patent prescription (US20200073096A1) specifies 10 lens elements in 8 groups with 4 aspherical surfaces. The interactive Optical X-Ray above traces rays through every surface in real time.
Related comparisons
- Fujifilm XF 16mm F1.4 R WR
- Fujifilm XF 18mm F1.4 R LM WR
- Fujifilm XF 18mm F2 R
- Fujifilm XF 14mm F2.8 R
Compare with similar portrait lenses
- Nikon 16mm f/2.8 AI-s Fisheye
- Canon RF 16mm F2.8 STM
- Canon 15mm f/2.8 Fisheye
- Sony Batis 18mm F2.8
- Fujifilm GF 23mm F4 R LM WR
Also see: depth of field, bokeh, crop factor, lens compression.