Find a lens for this look
eBay links may earn us a commission, at no extra cost to you.
Matching lenses from each maker's lineup, plus some classic medium and large format lenses. Email me if something is wrong or missing.
Fujifilm XF 50mm F1.0 R WR — Bokeh & Optical Ray-Tracing Simulator
Interactive 3D portrait ray-traced through the published US20210231927A1 optical prescription (12 elements in 9 groups, 2 aspherical) with a 50.0 mm entrance pupil and 0.7 m minimum focus.
Optical & Portrait Specifications (Upper Body Framing)
| Optical & Portrait Metric | Measured / Patent Value | What It Means in Practice |
|---|---|---|
| Patent Prescription | US20210231927A1 · 12 elements in 9 groups (2 aspherical) | Traced surface by surface in WebGL2 |
| Entrance Pupil Diameter | 50.0 mm (at f/1) | Controls distant background blur disc size |
| Corner Bokeh Roundness (90% Field) | 58% at f/1 (≥86% from f/1.8) · -1.1 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) | 50.3 mm (+0.6%) | Actual framing focal length at portrait distance |
| Depth of Field (Sharp Zone) | 22 cm (2.95 m – 3.17 m) | Sharp zone at wide-open aperture |
| Minimum Focus Distance | 0.7 m | Closest focusing distance from the sensor |
Questions
How much background blur and corner cat's-eye does the Fujifilm XF 50mm F1.0 R WR produce?
Wide open at f/1, the Fujifilm XF 50mm F1.0 R WR has a 50.0 mm entrance pupil (50 mm ÷ 1) and 58% bokeh roundness in the 90% corner (-1.1 EV corner falloff, reaching ≥86% roundness from f/1.8). In an upper-body portrait at 3.06 m, the sharp depth-of-field zone spans 22 cm (2.95 m to 3.17 m) with a 26° horizontal background angle of view.
Does the Fujifilm XF 50mm F1.0 R WR show focus breathing at portrait distance?
Based on patent US20210231927A1, tracing the focusing group at 3.06 m gives an effective framing focal length of 50.3 mm (+0.6% 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 F1.0 R WR?
The patent prescription (US20210231927A1) specifies 12 lens elements in 9 groups with 2 aspherical surfaces. The interactive Optical X-Ray above traces rays through every surface in real time.
Related comparisons
- Fujifilm XF 50mm F1.0 R WR vs. Fujifilm XF 56mm F1.2 R WR
- Fujifilm XF 50mm F2 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
- Canon 50mm f/1.0 L
- Canon 50mm f/0.95
- Sony FE 50mm F1.2 GM
- Leica Noctilux-M 50mm f/0.95 ASPH.
- Nikon NIKKOR Z 50mm f/1.2 S
- Fujifilm GF 80mm F1.7 R WR
Also see: depth of field, bokeh, crop factor, lens compression.