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Canon EF 100mm f/2.8L Macro IS USM — Simulatore di bokeh e ray-tracing ottico
Interactive 3D portrait ray-traced through the published US7864451B2 optical prescription (15 elements in 12 groups) with a 35.7 mm entrance pupil and 0.3 m minimum focus.
Specifiche ottiche e ritratto (inquadratura mezzo busto)
| Optical & Portrait Metric | Measured / Patent Value | What It Means in Practice |
|---|---|---|
| Patent Prescription | US7864451B2 · 15 elements in 12 groups | Traced surface by surface in WebGL2 |
| Entrance Pupil Diameter | 35.7 mm (at f/2.8) | Controls distant background blur disc size |
| Upper-Body Working Distance | 4.01 m | Camera-to-subject distance for head-to-waist framing |
| Effective Focal Length (Breathing) | 102.2 mm (+2.2%) | Actual framing focal length at portrait distance |
| Depth of Field (Sharp Zone) | 39 cm (3.82 m – 4.21 m) | Sharp zone at wide-open aperture |
| Minimum Focus Distance | 0.3 m | Closest focusing distance from the sensor |
Domande
How much background blur does the Canon EF 100mm f/2.8L Macro IS USM produce?
Wide open at f/2.8, the Canon EF 100mm f/2.8L Macro IS USM has a 35.7 mm entrance pupil (100 mm ÷ 2.8). In an upper-body portrait at 4.01 m, the sharp depth-of-field zone spans 39 cm (3.82 m to 4.21 m), while mechanical vignetting and 15 glass elements shape the out-of-focus highlights.
Does the Canon EF 100mm f/2.8L Macro IS USM show focus breathing at portrait distance?
Based on patent US7864451B2, tracing the focusing group at 4.01 m gives an effective framing focal length of 102.2 mm (+2.2% vs. the nominal 100 mm). You can toggle "Match subject size" in the simulator to see the framing shift live.
What optical design is inside the Canon EF 100mm f/2.8L Macro IS USM?
The patent prescription (US7864451B2) specifies 15 lens elements in 12 groups. The interactive Optical X-Ray above traces rays through every surface in real time.
Confronti diretti da brevetto con Canon EF 100mm f/2.8L Macro IS USM
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Vedi anche: profondità di campo, bokeh, fattore di crop, compressione.