RF800mm f/5.6L IS USM
| Angle of View (Diagonal) | 03°05′ |
| Angle of View (Horizontal) | 02°35′ |
| Angle of View (Vertical) | 01°40′ |
| Closest Focusing Distance (m, ft) | 2.6 / 8.53 |
| Construction (Groups Elements) | 18,26 |
| Diameter x Length (mm) (Approx.) | 163 × 432 |
| Distance Scale | - |
| Drive System | Ring USM |
| Filter Size (mm) | 52 (drop-in filter) |
| Max. Magnification (x) | 0.34 |
| Min. Aperture | 64 |
| No. of Diaphragm Blades | 9 |
| Anti-dust and Moisture | Yes |
| Weight (g) (Approx.) | 3,140 |
| Accessories (Lens Cap) | E-180E |
| Accessories (Lens Hood) | ET-155 (WIII) / ET-155B(sold separately) |
| Accessories (Lens Bag) | LS600 |