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Nikon 60mm f/2.8 G Macro FX — Bokeh & Optical Ray-Tracing Simulator
Interactive 3D portrait ray-traced through the published US7898744B2 optical prescription (12 elements in 9 groups, 2 aspherical) with a 21.4 mm entrance pupil and 0.18 m minimum focus.
Optical & Portrait Specifications (Upper Body Framing)
| Optical & Portrait Metric | Measured / Patent Value | What It Means in Practice |
|---|---|---|
| Patent Prescription | US7898744B2 · 12 elements in 9 groups (2 aspherical) | Traced surface by surface in WebGL2 |
| Entrance Pupil Diameter | 21.4 mm (at f/2.8) | Controls distant background blur disc size |
| Corner Bokeh Roundness (90% Field) | 54% at f/2.8 (≥86% from f/5.6) · -1.1 EV | Mechanical vignetting (cat’s-eye vs. round corner highlights) |
| Background Field of View (Compression) | 34° horizontal | Width of the background room visible behind the subject |
| Upper-Body Working Distance | 2.41 m | Camera-to-subject distance for head-to-waist framing |
| Effective Focal Length (Breathing) | 59.2 mm (-1.3%) | Actual framing focal length at portrait distance |
| Depth of Field (Sharp Zone) | 40 cm (2.23 m – 2.63 m) | Sharp zone at wide-open aperture |
| Minimum Focus Distance | 0.18 m | Closest focusing distance from the sensor |
Questions
How much background blur and corner cat's-eye does the Nikon 60mm f/2.8 G Macro FX produce?
Wide open at f/2.8, the Nikon 60mm f/2.8 G Macro FX has a 21.4 mm entrance pupil (60 mm ÷ 2.8) and 54% bokeh roundness in the 90% corner (-1.1 EV corner falloff, reaching ≥86% roundness from f/5.6). In an upper-body portrait at 2.41 m, the sharp depth-of-field zone spans 40 cm (2.23 m to 2.63 m) with a 34° horizontal background angle of view.
Does the Nikon 60mm f/2.8 G Macro FX show focus breathing at portrait distance?
Based on patent US7898744B2, tracing the focusing group at 2.41 m gives an effective framing focal length of 59.2 mm (-1.3% vs. the nominal 60 mm). You can toggle "Match subject size" in the simulator to see the framing shift live.
What optical design is inside the Nikon 60mm f/2.8 G Macro FX?
The patent prescription (US7898744B2) specifies 12 lens elements in 9 groups with 2 aspherical surfaces. The interactive Optical X-Ray above traces rays through every surface in real time.
Related comparisons
- Nikon 58mm f/1.2 Noct-NIKKOR
- Nikon 58mm f/1.4 G FX
- Nikon Nikkor-S Auto 58mm f/1.4
- Nikon 55mm f/1.2 AI
- Nikon 55mm f/2.8 Micro AI-s
- Nikon 50mm f/1.4 AI-s
Compare with similar portrait lenses
- Canon 60mm f/2.8 EF-S MACRO
- Fujifilm GF 63mm F2.8 R WR
- Fujifilm XF 60mm F2.4 R Macro
- Sony Sonnar FE 55mm F1.8 ZA
- Sony Hexanon AR 40mm F1.8
Also see: depth of field, bokeh, crop factor, lens compression.