RF400mm f/2.8L IS USM
| Angle of View (Diagonal) | 06°10′ |
| Angle of View (Horizontal) | 05°10′ |
| Angle of View (Vertical) | 03°30′ |
| Closest Focusing Distance (m, ft) | 2.5 / 8.20 |
| Construction (Groups Elements) | 13,17 |
| Diameter x Length (mm) (Approx.) | 163 x 367 |
| Distance Scale | - |
| Drive System | Ring USM |
| Filter Size (mm) | 52 (Drop-in) |
| Max. Magnification (x) | 0.17 |
| Min. Aperture | 32 |
| No. of Diaphragm Blades | 9 |
| Anti-dust and Moisture | Supported |
| Weight (g) (Approx.) | 2890 |
| Accessories (Lens Cap) | Lens Cap E-180E & Lens Dust Cap RF (included) |
| Accessories (Lens Hood) | Lens Hood ET-155 (WIII) (included) / Lens Hood ET-155B (sold separately) |
| Accessories (Lens Bag) | Lens Case LS400 (included) |