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Nikon 24mm f/1.4G FX — Bokeh & Optical Ray-Tracing Simulator
Interactive 3D portrait ray-traced through the published US8416512B2 optical prescription (14 elements in 10 groups, 2 aspherical) with a 17.1 mm entrance pupil and 0.25 m minimum focus.
Optical & Portrait Specifications (Upper Body Framing)
| Optical & Portrait Metric | Measured / Patent Value | What It Means in Practice |
|---|---|---|
| Patent Prescription | US8416512B2 · 14 elements in 10 groups (2 aspherical) | Traced surface by surface in WebGL2 |
| Entrance Pupil Diameter | 17.1 mm (at f/1.4) | Controls distant background blur disc size |
| Corner Bokeh Roundness (90% Field) | 60% at f/1.4 (≥86% from f/2.8) · -1.3 EV | Mechanical vignetting (cat’s-eye vs. round corner highlights) |
| Background Field of View (Compression) | 74° horizontal | Width of the background room visible behind the subject |
| Upper-Body Working Distance | 0.99 m | Camera-to-subject distance for head-to-waist framing |
| Effective Focal Length (Breathing) | 23.8 mm (-0.9%) | Actual framing focal length at portrait distance |
| Depth of Field (Sharp Zone) | 21 cm (90 cm – 1.11 m) | Sharp zone at wide-open aperture |
| Minimum Focus Distance | 0.25 m | Closest focusing distance from the sensor |
Questions
How much background blur and corner cat's-eye does the Nikon 24mm f/1.4G FX produce?
Wide open at f/1.4, the Nikon 24mm f/1.4G FX has a 17.1 mm entrance pupil (24 mm ÷ 1.4) and 60% bokeh roundness in the 90% corner (-1.3 EV corner falloff, reaching ≥86% roundness from f/2.8). In an upper-body portrait at 0.99 m, the sharp depth-of-field zone spans 21 cm (90 cm to 1.11 m) with a 74° horizontal background angle of view.
Does the Nikon 24mm f/1.4G FX show focus breathing at portrait distance?
Based on patent US8416512B2, tracing the focusing group at 0.99 m gives an effective framing focal length of 23.8 mm (-0.9% vs. the nominal 24 mm). You can toggle "Match subject size" in the simulator to see the framing shift live.
What optical design is inside the Nikon 24mm f/1.4G FX?
The patent prescription (US8416512B2) specifies 14 lens elements in 10 groups with 2 aspherical surfaces. The interactive Optical X-Ray above traces rays through every surface in real time.
Related comparisons
- Nikon AF-S 24mm f/1.8G ED
- Nikon 24mm f/2.0 AI-s
- Nikon 24mm f/2.8 AI-s
- Nikon 24mm f/3.5 PC-E FX
- Nikon Nikkor-O 2.1cm f/4
- Nikon 28mm f/1.4E FX
Compare with similar portrait lenses
- Sony FE 24mm F1.4 GM
- Canon RF 24mm F1.4 L VCM
- Canon FD 24mm f/1.4 S.S.C. Aspherical
- Nikon NIKKOR Z 24mm f/1.8 S
- Nikon 35mm f/2 AF-D FX
Also see: depth of field, bokeh, crop factor, lens compression.