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Nikon 58mm f/1.2 Noct-NIKKOR — Simulatore di bokeh e ray-tracing ottico
Interactive 3D portrait ray-traced through the published US4621909A optical prescription (7 elements in 6 groups) with a 48.3 mm entrance pupil and 0.5 m minimum focus.
Specifiche ottiche e ritratto (inquadratura mezzo busto)
| Optical & Portrait Metric | Measured / Patent Value | What It Means in Practice |
|---|---|---|
| Patent Prescription | US4621909A · 7 elements in 6 groups | Traced surface by surface in WebGL2 |
| Entrance Pupil Diameter | 48.3 mm (at f/1.2) | Controls distant background blur disc size |
| Upper-Body Working Distance | 2.33 m | Camera-to-subject distance for head-to-waist framing |
| Effective Focal Length (Breathing) | 58.0 mm (-0.0%) | Actual framing focal length at portrait distance |
| Depth of Field (Sharp Zone) | 17 cm (2.25 m – 2.42 m) | Sharp zone at wide-open aperture |
| Minimum Focus Distance | 0.5 m | Closest focusing distance from the sensor |
Domande
How much background blur does the Nikon 58mm f/1.2 Noct-NIKKOR produce?
Wide open at f/1.2, the Nikon 58mm f/1.2 Noct-NIKKOR has a 48.3 mm entrance pupil (58 mm ÷ 1.2). In an upper-body portrait at 2.33 m, the sharp depth-of-field zone spans 17 cm (2.25 m to 2.42 m), while mechanical vignetting and 7 glass elements shape the out-of-focus highlights.
Does the Nikon 58mm f/1.2 Noct-NIKKOR show focus breathing at portrait distance?
Based on patent US4621909A, tracing the focusing group at 2.33 m gives an effective framing focal length of 58.0 mm (-0.0% vs. the nominal 58 mm). You can toggle "Match subject size" in the simulator to see the framing shift live.
What optical design is inside the Nikon 58mm f/1.2 Noct-NIKKOR?
The patent prescription (US4621909A) specifies 7 lens elements in 6 groups. The interactive Optical X-Ray above traces rays through every surface in real time.
Confronti diretti da brevetto con Nikon 58mm f/1.2 Noct-NIKKOR
- Nikon 58mm f/1.2 Noct-NIKKOR vs. Nikon NIKKOR Z 58mm f/0.95 S Noct
- Nikon 58mm f/1.2 Noct-NIKKOR vs. Nikon 58mm f/1.4 G FX
Confronti collegati
- Nikon 58mm f/1.4 G FX
- Nikon NIKKOR Z 58mm f/0.95 S Noct
- Nikon NIKKOR Z 85mm f/1.8 S
- Sony FE 85mm f/1.8
Vedi anche: profondità di campo, bokeh, fattore di crop, compressione.