Interactive 3D portrait ray-traced through the published JP2022-030896A optical prescription (10 elements in 7 groups, 4 aspherical) with a 8.6 mm entrance pupil and 0.24 m minimum focus.
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| Optical & Portrait Metric | Measured / Patent Value | What It Means in Practice |
|---|---|---|
| Patent Prescription | JP2022-030896A · 10 elements in 7 groups (4 aspherical) | Traced surface by surface in WebGL2 |
| Entrance Pupil Diameter | 8.6 mm (at f/2.8) | 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) | 23.6 mm (-1.7%) | Actual framing focal length at portrait distance |
| Depth of Field (Sharp Zone) | 44 cm (82 cm – 1.25 m) | Sharp zone at wide-open aperture |
| Minimum Focus Distance | 0.24 m | Closest focusing distance from the sensor |
Wide open at f/2.8, the Sony FE 24mm F2.8 G has a 8.6 mm entrance pupil (24 mm ÷ 2.8). In an upper-body portrait at 0.99 m, the sharp depth-of-field zone spans 44 cm (82 cm to 1.25 m), while mechanical vignetting and 10 glass elements shape the out-of-focus highlights.
Based on patent JP2022-030896A, tracing the focusing group at 0.99 m gives an effective framing focal length of 23.6 mm (-1.7% vs. the nominal 24 mm). You can toggle "Match subject size" in the simulator to see the framing shift live.
The patent prescription (JP2022-030896A) specifies 10 lens elements in 7 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.
