Expanded Specifications Canon RF 400mm F2.8L IS USM Lens
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| Optical Features / Specifications | Image Size |
| Image Size | Full frame |
| Angle of View (Horzntl, Vertl, Diagnl) | 190°, 190°, 190° |
| Lens Construction (Elements/Groups) | 12/10 |
| Special Optics | 2 x UD |
| Special Features | Dual Fisheye with Baseline length of 60mm |
| Number of Diaphragm Blades | 7 |
| Minimum Aperture | 16 |
| Closest Focusing Distance (m) | 0.2 |
| Maximum Magnification (x) | 0.03 |
| Control Ring | No |
| Coatings | Super Spectra, SWC |
| Fluorine | Front |
| Accessories | |
| Lens Cap | Lens Cap 5.2 (center pinch type) |
| Lens Case/Pouch | LS1014 |
| Rear End Cap | Lens Dust Cap RF |
| Extender Compatibility | Not Compatible |
| Other Accessories | Hexagon wrench |
| Physical Specifications | |
| Dust/Moisture Resistance | Rubber ring on lens mount 1 |
| Filter Diameter (mm) | Rear-mounted gelatin filter (35x20mm) |
| Max. Diameter x Length (mm)2 | (121.1 x 83.6) x 53.53 |
| Weight (g) | 350 |
| 1 Lenses with dust/moisture resistance are fitted with a rubber ring on the lens mount which may cause slight abrasion of the camera mount. This in no way effects either the lens or camera performance. | |
| 2 Lens dimensions when in retracted state | |
| 3 Lens dimensions when in retracted state. | |
