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Fujifilm Fujinon CM-W 150mm f/5.6 — Bokeh & Optical Ray-Tracing Simulator
Interactive 3D portrait ray-traced through the published DE3907928A1 optical prescription (7 elements in 5 groups) with a 26.8 mm entrance pupil and 1 m minimum focus.
Optical & Portrait Specifications (Upper Body Framing)
| Optical & Portrait Metric | Measured / Patent Value | What It Means in Practice |
|---|---|---|
| Patent Prescription | DE3907928A1 · 7 elements in 5 groups | Traced surface by surface in WebGL2 |
| Entrance Pupil Diameter | 26.8 mm (at f/5.6) | Controls distant background blur disc size |
| Corner Bokeh Roundness (90% Field) | 42% at f/5.6 · -2.1 EV | Mechanical vignetting (cat’s-eye vs. round corner highlights) |
| Background Field of View (Compression) | 41° horizontal | Width of the background room visible behind the subject |
| Upper-Body Working Distance | 1.80 m | Camera-to-subject distance for head-to-waist framing |
| Effective Focal Length (Breathing) | 162.4 mm (+8.2%) | Actual framing focal length at portrait distance |
| Depth of Field (Sharp Zone) | 22 cm (1.70 m – 1.92 m) | Sharp zone at wide-open aperture |
| Minimum Focus Distance | 1 m | Closest focusing distance from the sensor |
Questions
How much background blur and corner cat's-eye does the Fujifilm Fujinon CM-W 150mm f/5.6 produce?
Wide open at f/5.6, the Fujifilm Fujinon CM-W 150mm f/5.6 has a 26.8 mm entrance pupil (150 mm ÷ 5.6) and 42% bokeh roundness in the 90% corner (-2.1 EV corner falloff). In an upper-body portrait at 1.80 m, the sharp depth-of-field zone spans 22 cm (1.70 m to 1.92 m) with a 41° horizontal background angle of view.
Does the Fujifilm Fujinon CM-W 150mm f/5.6 show focus breathing at portrait distance?
Based on patent DE3907928A1, tracing the focusing group at 1.80 m gives an effective framing focal length of 162.4 mm (+8.2% vs. the nominal 150 mm). You can toggle "Match subject size" in the simulator to see the framing shift live.
What optical design is inside the Fujifilm Fujinon CM-W 150mm f/5.6?
The patent prescription (DE3907928A1) specifies 7 lens elements in 5 groups. The interactive Optical X-Ray above traces rays through every surface in real time.
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Compare with similar portrait lenses
- Leica ELMAR 135mm f/4
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- Fujifilm GF 120mm F4 R LM OIS WR Macro
- Nikon 85mm f/3.5 VR DX
- Nikon 85mm f/2.8 PC-E FX
Also see: depth of field, bokeh, crop factor, lens compression.