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Fujifilm Fujinon SWD 65mm f/5.6 — Bokeh & Optical Ray-Tracing Simulator
Interactive 3D portrait ray-traced through the published JPS56140311A optical prescription (6 elements in 6 groups) with a 11.6 mm entrance pupil and 0.5 m minimum focus.
Optical & Portrait Specifications (Upper Body Framing)
| Optical & Portrait Metric | Measured / Patent Value | What It Means in Practice |
|---|---|---|
| Patent Prescription | JPS56140311A · 6 elements in 6 groups | Traced surface by surface in WebGL2 |
| Entrance Pupil Diameter | 11.6 mm (at f/5.6) | Controls distant background blur disc size |
| Corner Bokeh Roundness (90% Field) | 35% at f/5.6 · -4.1 EV | Mechanical vignetting (cat’s-eye vs. round corner highlights) |
| Background Field of View (Compression) | 81° horizontal | Width of the background room visible behind the subject |
| Upper-Body Working Distance | 0.81 m | Camera-to-subject distance for head-to-waist framing |
| Effective Focal Length (Breathing) | 70.4 mm (+8.3%) | Actual framing focal length at portrait distance |
| Depth of Field (Sharp Zone) | 24 cm (71 cm – 95 cm) | Sharp zone at wide-open aperture |
| Minimum Focus Distance | 0.5 m | Closest focusing distance from the sensor |
Questions
How much background blur and corner cat's-eye does the Fujifilm Fujinon SWD 65mm f/5.6 produce?
Wide open at f/5.6, the Fujifilm Fujinon SWD 65mm f/5.6 has a 11.6 mm entrance pupil (65 mm ÷ 5.6) and 35% bokeh roundness in the 90% corner (-4.1 EV corner falloff). In an upper-body portrait at 0.81 m, the sharp depth-of-field zone spans 24 cm (71 cm to 95 cm) with a 81° horizontal background angle of view.
Does the Fujifilm Fujinon SWD 65mm f/5.6 show focus breathing at portrait distance?
Based on patent JPS56140311A, tracing the focusing group at 0.81 m gives an effective framing focal length of 70.4 mm (+8.3% vs. the nominal 65 mm). You can toggle "Match subject size" in the simulator to see the framing shift live.
What optical design is inside the Fujifilm Fujinon SWD 65mm f/5.6?
The patent prescription (JPS56140311A) specifies 6 lens elements in 6 groups. The interactive Optical X-Ray above traces rays through every surface in real time.
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Compare with similar portrait lenses
- Fujifilm GF 63mm F2.8 R WR
- Nikon 60mm f/2.8 G Macro FX
- Canon 60mm f/2.8 EF-S MACRO
- Fujifilm XF 60mm F2.4 R Macro
- Fujifilm Fujinon SW 90mm f/8
- Fujifilm Fujinon SWD 90mm f/5.6
Also see: depth of field, bokeh, crop factor, lens compression.