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Fujifilm XF 50mm F2 R WR — Bokeh & Optical Ray-Tracing Simulator
Interactive 3D portrait ray-traced through the published US10168507B2 optical prescription (9 elements in 7 groups, 2 aspherical) with a 25.0 mm entrance pupil and 0.39 m minimum focus.
Optical & Portrait Specifications (Upper Body Framing)
| Optical & Portrait Metric | Measured / Patent Value | What It Means in Practice |
|---|---|---|
| Patent Prescription | US10168507B2 · 9 elements in 7 groups (2 aspherical) | Traced surface by surface in WebGL2 |
| Entrance Pupil Diameter | 25.0 mm (at f/2) | Controls distant background blur disc size |
| Corner Bokeh Roundness (90% Field) | 89% at f/2 · -0.2 EV | Mechanical vignetting (cat’s-eye vs. round corner highlights) |
| Background Field of View (Compression) | 26° horizontal | Width of the background room visible behind the subject |
| Upper-Body Working Distance | 3.06 m | Camera-to-subject distance for head-to-waist framing |
| Effective Focal Length (Breathing) | 50.7 mm (+1.3%) | Actual framing focal length at portrait distance |
| Depth of Field (Sharp Zone) | 44 cm (2.86 m – 3.29 m) | Sharp zone at wide-open aperture |
| Minimum Focus Distance | 0.39 m | Closest focusing distance from the sensor |
Questions
How much background blur and corner cat's-eye does the Fujifilm XF 50mm F2 R WR produce?
Wide open at f/2, the Fujifilm XF 50mm F2 R WR has a 25.0 mm entrance pupil (50 mm ÷ 2) and 89% bokeh roundness in the 90% corner (-0.2 EV corner falloff). In an upper-body portrait at 3.06 m, the sharp depth-of-field zone spans 44 cm (2.86 m to 3.29 m) with a 26° horizontal background angle of view.
Does the Fujifilm XF 50mm F2 R WR show focus breathing at portrait distance?
Based on patent US10168507B2, tracing the focusing group at 3.06 m gives an effective framing focal length of 50.7 mm (+1.3% vs. the nominal 50 mm). You can toggle "Match subject size" in the simulator to see the framing shift live.
What optical design is inside the Fujifilm XF 50mm F2 R WR?
The patent prescription (US10168507B2) specifies 9 lens elements in 7 groups with 2 aspherical surfaces. The interactive Optical X-Ray above traces rays through every surface in real time.
Related comparisons
- Fujifilm XF 50mm F2 R WR vs. Fujifilm XF 56mm F1.2 R WR
- Fujifilm XF 50mm F1.0 R WR
- Fujifilm XF 56mm F1.2 R
- Fujifilm XF 56mm F1.2 R APD
- Fujifilm XF 56mm F1.2 R WR
- Fujifilm XF 60mm F2.4 R Macro
Compare with similar portrait lenses
Also see: depth of field, bokeh, crop factor, lens compression.