Canon EF800mm f/5.6L IS USM lens is a super telephoto lens with image stabilizer, designed for Canon EOS cameras.
This manual covers safe handling, storage, and preparation before using the Canon EF800mm f/5.6L IS USM telephoto lens. It explains the meaning of IS (Image Stabilizer) and USM (Ultrasonic Motor) and describes the lens’s key features such as fast autofocus, weather sealing, and compatibility with EF 1.4× and EF‑Z 2× converters.
The guide details installation and removal procedures, focusing mode selection (One‑Shot AF, AI‑Servo, Manual Focus), focusing distance adjustments, and the use of the AF‑stop button. A specifications table lists focal length, aperture range, minimum focusing distance, magnification, angle of view, weight, and other technical data. This manual is written in Chinese.
| Focal length | 800 mm |
|---|---|
| Maximum aperture | f/5.6 |
| Minimum aperture | f/32 |
| Minimum focusing distance | 6 m |
| Maximum magnification | 0.14× |
| Weight | 4500 g |
| Angle of view (horizontal) | 3° |
"IS" indicates Image Stabilizer.
"USM" indicates Ultrasonic Motor.
The minimum focusing distance is 6 meters.