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Nikon NIKKOR Z 35mm f/1.2 S — Bokeh & Optical Ray-Tracing Simulator
Interactive 3D portrait ray-traced through the published JP2025-052870A optical prescription (17 elements in 15 groups, 5 aspherical) with a 29.2 mm entrance pupil and 0.3 m minimum focus.
Optical & Portrait Specifications (Upper Body Framing)
| Optical & Portrait Metric | Measured / Patent Value | What It Means in Practice |
|---|---|---|
| Patent Prescription | JP2025-052870A · 17 elements in 15 groups (5 aspherical) | Traced surface by surface in WebGL2 |
| Entrance Pupil Diameter | 29.2 mm (at f/1.2) | Controls distant background blur disc size |
| Corner Bokeh Roundness (90% Field) | 33% at f/1.2 · -1.9 EV | Mechanical vignetting (cat’s-eye vs. round corner highlights) |
| Background Field of View (Compression) | 55° horizontal | Width of the background room visible behind the subject |
| Upper-Body Working Distance | 1.42 m | Camera-to-subject distance for head-to-waist framing |
| Effective Focal Length (Breathing) | 34.5 mm (-1.3%) | Actual framing focal length at portrait distance |
| Depth of Field (Sharp Zone) | 17 cm (1.34 m – 1.51 m) | Sharp zone at wide-open aperture |
| Minimum Focus Distance | 0.3 m | Closest focusing distance from the sensor |
Questions
How much background blur and corner cat's-eye does the Nikon NIKKOR Z 35mm f/1.2 S produce?
Wide open at f/1.2, the Nikon NIKKOR Z 35mm f/1.2 S has a 29.2 mm entrance pupil (35 mm ÷ 1.2) and 33% bokeh roundness in the 90% corner (-1.9 EV corner falloff). In an upper-body portrait at 1.42 m, the sharp depth-of-field zone spans 17 cm (1.34 m to 1.51 m) with a 55° horizontal background angle of view.
Does the Nikon NIKKOR Z 35mm f/1.2 S show focus breathing at portrait distance?
Based on patent JP2025-052870A, tracing the focusing group at 1.42 m gives an effective framing focal length of 34.5 mm (-1.3% vs. the nominal 35 mm). You can toggle "Match subject size" in the simulator to see the framing shift live.
What optical design is inside the Nikon NIKKOR Z 35mm f/1.2 S?
The patent prescription (JP2025-052870A) specifies 17 lens elements in 15 groups with 5 aspherical surfaces. The interactive Optical X-Ray above traces rays through every surface in real time.
Related comparisons
- Nikon NIKKOR Z 35mm f/1.2 S vs. Nikon NIKKOR Z 35mm f/1.8 S
- Nikon NIKKOR Z 35mm f/1.2 S vs. Nikon NIKKOR Z 35mm f/1.4
- Nikon NIKKOR Z 35mm f/1.2 S vs. Nikon NIKKOR Z 50mm f/1.2 S
- Nikon NIKKOR Z 35mm f/1.4
- Nikon NIKKOR Z 35mm f/1.8 S
- Nikon NIKKOR Z 40mm f/2
Compare with similar portrait lenses
- Nikon 35mm f/1.4 AI-s
- Sony Distagon FE 35mm F1.4 ZA
- Sony Distagon T* 35mm F1.4
- Canon RF 35mm F1.4 L VCM
- Nikon NIKKOR Z 50mm f/1.8 S
Also see: depth of field, bokeh, crop factor, lens compression.