Interactive 3D portrait ray-traced through the published WO2019220618A1 optical prescription (13 elements in 9 groups, 3 aspherical) with a 27.8 mm entrance pupil and 0.4 m minimum focus.
eBay-links kunnen ons een commissie opleveren, zonder extra kosten voor jou.
Passende objectieven uit het aanbod van elke fabrikant, plus enkele klassieke midden- en grootformaatobjectieven. Mail me als er iets fout of onvolledig is.
| Optical & Portrait Metric | Measured / Patent Value | What It Means in Practice |
|---|---|---|
| Patent Prescription | WO2019220618A1 · 13 elements in 9 groups (3 aspherical) | Traced surface by surface in WebGL2 |
| Entrance Pupil Diameter | 27.8 mm (at f/1.8) | Controls distant background blur disc size |
| Upper-Body Working Distance | 2.01 m | Camera-to-subject distance for head-to-waist framing |
| Effective Focal Length (Breathing) | 48.6 mm (-2.9%) | Actual framing focal length at portrait distance |
| Depth of Field (Sharp Zone) | 26 cm (1.89 m – 2.15 m) | Sharp zone at wide-open aperture |
| Minimum Focus Distance | 0.4 m | Closest focusing distance from the sensor |
Wide open at f/1.8, the Nikon NIKKOR Z 50mm f/1.8 S has a 27.8 mm entrance pupil (50 mm ÷ 1.8). In an upper-body portrait at 2.01 m, the sharp depth-of-field zone spans 26 cm (1.89 m to 2.15 m), while mechanical vignetting and 13 glass elements shape the out-of-focus highlights.
Based on patent WO2019220618A1, tracing the focusing group at 2.01 m gives an effective framing focal length of 48.6 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 (WO2019220618A1) specifies 13 lens elements in 9 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.
