Canon EF100-400mm f/4.5-5.6L IS USM lens is a high-quality telephoto zoom lens designed specifically for EOS cameras. The lens features an image stabilizer, which enables shooting of sharp, clear images. In addition, the lens is equipped with a USM (ultrasonic motor) for silent and high-speed autofocus.
This manual explains safe handling of the EF100-400mm lens, including warnings against viewing the sun through the lens and precautions when moving between cold and warm environments. It also details how to install and remove the lens, set focus modes, and adjust the zoom and image‑stabilizer controls.
Operational sections cover focal‑range selection, zoom‑ring resistance adjustment, and the use of the image‑stabilizer modes. The final section lists the lens’s technical specifications such as focal length, aperture range, and physical dimensions. This manual is written in Chinese.
| Focal length / aperture | 100‑400 mm f/4.5‑5.6 |
|---|---|
| Lens construction | 14 groups, 17 elements |
| Minimum aperture | f/32‑40 |
| Angle of view (diagonal) | 24°‑6°10′ |
| Closest focusing distance | 1.8 m |
| Maximum magnification | 0.2× at 400 mm |
| Filter thread diameter | 77 mm |
| Maximum diameter × length | 92 mm × 189 mm |
| Weight | 1380 g |
| Lens hood model | ET‑83C |
| Lens case model | LZ1324 |
Align the O‑mark on the dust‑cover with the lens installation mark and turn the cap clockwise; turn counter‑clockwise to remove it.