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Canon 60mm f/2.8 EF-S MACRO — Bokeh & Optical Ray-Tracing Simulator
Interactive 3D portrait ray-traced through the published JP2006-153942A optical prescription (12 elements in 8 groups) with a 21.4 mm entrance pupil and 0.2 m minimum focus.
Optical & Portrait Specifications (Upper Body Framing)
| Optical & Portrait Metric | Measured / Patent Value | What It Means in Practice |
|---|---|---|
| Patent Prescription | JP2006-153942A · 12 elements in 8 groups | 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) | 68% at f/2.8 (≥86% from f/4) · -0.7 EV | Mechanical vignetting (cat’s-eye vs. round corner highlights) |
| Background Field of View (Compression) | 22° horizontal | Width of the background room visible behind the subject |
| Upper-Body Working Distance | 3.67 m | Camera-to-subject distance for head-to-waist framing |
| Effective Focal Length (Breathing) | 60.8 mm (+1.3%) | Actual framing focal length at portrait distance |
| Depth of Field (Sharp Zone) | 61 cm (3.39 m – 4.00 m) | Sharp zone at wide-open aperture |
| Minimum Focus Distance | 0.2 m | Closest focusing distance from the sensor |
Questions
How much background blur and corner cat's-eye does the Canon 60mm f/2.8 EF-S MACRO produce?
Wide open at f/2.8, the Canon 60mm f/2.8 EF-S MACRO has a 21.4 mm entrance pupil (60 mm ÷ 2.8) and 68% bokeh roundness in the 90% corner (-0.7 EV corner falloff, reaching ≥86% roundness from f/4). In an upper-body portrait at 3.67 m, the sharp depth-of-field zone spans 61 cm (3.39 m to 4.00 m) with a 22° horizontal background angle of view.
Does the Canon 60mm f/2.8 EF-S MACRO show focus breathing at portrait distance?
Based on patent JP2006-153942A, tracing the focusing group at 3.67 m gives an effective framing focal length of 60.8 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 Canon 60mm f/2.8 EF-S MACRO?
The patent prescription (JP2006-153942A) specifies 12 lens elements in 8 groups. The interactive Optical X-Ray above traces rays through every surface in real time.
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Compare with similar portrait lenses
- Nikon 60mm f/2.8 G Macro FX
- Fujifilm XF 60mm F2.4 R Macro
- Nikon 55mm f/2.8 Micro AI-s
- Fujifilm GF 63mm F2.8 R WR
- Sony Sonnar FE 55mm F1.8 ZA
- Canon 50mm f/2.5 EF Macro
Also see: depth of field, bokeh, crop factor, lens compression.