Interactive 3D portrait ray-traced through the published US20220019061A1 optical prescription (11 elements in 9 groups, 1 aspherical) with a 13.3 mm entrance pupil and 0.14 m minimum focus.
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| Optical & Portrait Metric | Measured / Patent Value | What It Means in Practice |
|---|---|---|
| Patent Prescription | US20220019061A1 · 11 elements in 9 groups (1 aspherical) | Traced surface by surface in WebGL2 |
| Entrance Pupil Diameter | 13.3 mm (at f/1.8) | Controls distant background blur disc size |
| Upper-Body Working Distance | 0.99 m | Camera-to-subject distance for head-to-waist framing |
| Effective Focal Length (Breathing) | 23.0 mm (-4.3%) | Actual framing focal length at portrait distance |
| Depth of Field (Sharp Zone) | 27 cm (87 cm – 1.15 m) | Sharp zone at wide-open aperture |
| Minimum Focus Distance | 0.14 m | Closest focusing distance from the sensor |
Wide open at f/1.8, the Canon RF 24mm F1.8 MACRO IS STM has a 13.3 mm entrance pupil (24 mm ÷ 1.8). In an upper-body portrait at 0.99 m, the sharp depth-of-field zone spans 27 cm (87 cm to 1.15 m), while mechanical vignetting and 11 glass elements shape the out-of-focus highlights.
Based on patent US20220019061A1, tracing the focusing group at 0.99 m gives an effective framing focal length of 23.0 mm (-4.3% vs. the nominal 24 mm). You can toggle "Match subject size" in the simulator to see the framing shift live.
The patent prescription (US20220019061A1) specifies 11 lens elements in 9 groups with 1 aspherical surfaces. The interactive Optical X-Ray above traces rays through every surface in real time.
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Zobacz też: głębia ostrości, bokeh, współczynnik crop, kompresja.
