Interactive 3D portrait ray-traced through the published JP2023-029039A optical prescription (13 elements in 8 groups, 4 aspherical) with a 46.7 mm entrance pupil and 0.5 m minimum focus.
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| Optical & Portrait Metric | Measured / Patent Value | What It Means in Practice |
|---|---|---|
| Patent Prescription | JP2023-029039A · 13 elements in 8 groups (4 aspherical) | Traced surface by surface in WebGL2 |
| Entrance Pupil Diameter | 46.7 mm (at f/1.2) | Controls distant background blur disc size |
| Upper-Body Working Distance | 3.42 m | Camera-to-subject distance for head-to-waist framing |
| Effective Focal Length (Breathing) | 56.2 mm (+0.4%) | Actual framing focal length at portrait distance |
| Depth of Field (Sharp Zone) | 26 cm (3.30 m – 3.56 m) | Sharp zone at wide-open aperture |
| Minimum Focus Distance | 0.5 m | Closest focusing distance from the sensor |
Wide open at f/1.2, the Fujifilm XF 56mm F1.2 R WR has a 46.7 mm entrance pupil (56 mm ÷ 1.2). In an upper-body portrait at 3.42 m, the sharp depth-of-field zone spans 26 cm (3.30 m to 3.56 m), while mechanical vignetting and 13 glass elements shape the out-of-focus highlights.
Based on patent JP2023-029039A, tracing the focusing group at 3.42 m gives an effective framing focal length of 56.2 mm (+0.4% vs. the nominal 56 mm). You can toggle "Match subject size" in the simulator to see the framing shift live.
The patent prescription (JP2023-029039A) specifies 13 lens elements in 8 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.
