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.
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| 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 |
| Upper-Body Working Distance | 3.06 m | Camera-to-subject distance for head-to-waist framing |
| Effective Focal Length (Breathing) | 48.5 mm (-2.9%) | 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 |
Wide open at f/1, the Fujifilm XF 50mm F1.0 R WR has a 50.0 mm entrance pupil (50 mm ÷ 1). 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), while mechanical vignetting and 12 glass elements shape the out-of-focus highlights.
Based on patent US20210231927A1, tracing the focusing group at 3.06 m gives an effective framing focal length of 48.5 mm (-2.9% vs. the nominal 50 mm). You can toggle "Match subject size" in the simulator to see the framing shift live.
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.
Zie ook: scherptediepte, bokeh, cropfactor, compressie.
