EF400mm f/2.8L IS II USM
| Angle of View (Diagonal) | 6°10’ |
| Angle of View (Horizontal) | 5°10’ |
| Angle of View (Vertical) | 3°30’ |
| Closest Focusing Distance (m, ft) | 2.7/8.86 |
| Construction (Groups Elements) | 12-16 |
| Diameter x Length (mm) (Approx.) | 163 x 343 |
| Distance Scale | o |
| Drive System | Ring-type 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.) | 3850 |
| Accessories (Lens Cap) | E-180D |
| Accessories (Lens Hood) | ET-155 (WII) |
| Accessories (Lens Bag) | Lens Case 400C |