Interactive 3D portrait ray-traced through the published US20130033768A1 optical prescription (8 elements in 7 groups, 3 aspherical) with a 13.3 mm entrance pupil and 0.16 m minimum focus.
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| Optical & Portrait Metric | Measured / Patent Value | What It Means in Practice |
|---|---|---|
| Patent Prescription | US20130033768A1 · 8 elements in 7 groups (3 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 | 1.48 m | Camera-to-subject distance for head-to-waist framing |
| Effective Focal Length (Breathing) | 24.2 mm (+0.9%) | Actual framing focal length at portrait distance |
| Depth of Field (Sharp Zone) | 41 cm (1.31 m – 1.72 m) | Sharp zone at wide-open aperture |
| Minimum Focus Distance | 0.16 m | Closest focusing distance from the sensor |
Wide open at f/1.8, the Sony Sonnar E 24mm F1.8 ZA has a 13.3 mm entrance pupil (24 mm ÷ 1.8). In an upper-body portrait at 1.48 m, the sharp depth-of-field zone spans 41 cm (1.31 m to 1.72 m), while mechanical vignetting and 8 glass elements shape the out-of-focus highlights.
Based on patent US20130033768A1, tracing the focusing group at 1.48 m gives an effective framing focal length of 24.2 mm (+0.9% vs. the nominal 24 mm). You can toggle "Match subject size" in the simulator to see the framing shift live.
The patent prescription (US20130033768A1) specifies 8 lens elements in 7 groups with 3 aspherical surfaces. The interactive Optical X-Ray above traces rays through every surface in real time.
Zie ook: scherptediepte, bokeh, cropfactor, compressie.
