Interactive 3D portrait ray-traced through the published US20170010441A1 optical prescription (9 elements in 6 groups, 4 aspherical) with a 17.5 mm entrance pupil and 0.35 m minimum focus.
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| Optical & Portrait Metric | Measured / Patent Value | What It Means in Practice |
|---|---|---|
| Patent Prescription | US20170010441A1 · 9 elements in 6 groups (4 aspherical) | Traced surface by surface in WebGL2 |
| Entrance Pupil Diameter | 17.5 mm (at f/2) | Controls distant background blur disc size |
| Upper-Body Working Distance | 2.15 m | Camera-to-subject distance for head-to-waist framing |
| Effective Focal Length (Breathing) | 34.7 mm (-0.8%) | Actual framing focal length at portrait distance |
| Depth of Field (Sharp Zone) | 44 cm (1.95 m – 2.39 m) | Sharp zone at wide-open aperture |
| Minimum Focus Distance | 0.35 m | Closest focusing distance from the sensor |
Wide open at f/2, the Fujifilm XF 35mm F2 R WR has a 17.5 mm entrance pupil (35 mm ÷ 2). In an upper-body portrait at 2.15 m, the sharp depth-of-field zone spans 44 cm (1.95 m to 2.39 m), while mechanical vignetting and 9 glass elements shape the out-of-focus highlights.
Based on patent US20170010441A1, tracing the focusing group at 2.15 m gives an effective framing focal length of 34.7 mm (-0.8% vs. the nominal 35 mm). You can toggle "Match subject size" in the simulator to see the framing shift live.
The patent prescription (US20170010441A1) specifies 9 lens elements in 6 groups with 4 aspherical surfaces. The interactive Optical X-Ray above traces rays through every surface in real time.
Voir aussi: profondeur de champ, bokeh, facteur de recadrage, compression.
