EF800mm f/5.6L IS USM
| Angle of View (Diagonal) | 3°5’ |
| Angle of View (Horizontal) | 2°35’ |
| Angle of View (Vertical) | 1°40’ |
| Closest Focusing Distance (m, ft) | 6/19.69 |
| Construction (Groups Elements) | 14-18 |
| Diameter x Length (mm) (Approx.) | 163 x 461 |
| Distance Scale | o |
| Drive System | Ring-type USM |
| Filter Size (mm) | 52 (drop-in) |
| Max. Magnification (x) | 0.14 |
| Min. Aperture | 32 |
| No. of Diaphragm Blades | 8 |
| Anti-dust and Moisture | Supported |
| Weight (g) (Approx.) | 4500 |
| Accessories (Lens Cap) | E-180D |
| Accessories (Lens Hood) | ET-155 |
| Accessories (Lens Bag) | Lens Case 800 |