This document introduces the features and characteristics of Canon's EF300mm f/2.8L IS USM, EF400mm f/2.8L IS USM, EF500mm f/4L IS USM, and EF600mm f/4L IS USM lenses, including image stabilization, autofocus with ultrasonic motor, and dust and water resistance.
The manual explains safe handling of the high‑performance telephoto lenses, including precautions against condensation when moving the lens between cold and warm environments, and warnings about sunlight exposure and temperature extremes. It also covers basic installation, removal, and cleaning of the lens and its electronic contacts.
Detailed operating instructions cover focus mode selection (AF/MF), focal‑range settings, image‑stabilizer usage, focus‑preset functions, and the use of optional accessories such as teleconverters and extension tubes. Technical specifications for each focal length are listed, along with weight, filter size, and minimum focusing distance.
| Lens construction | 13 groups, 17 elements |
|---|---|
| Minimum aperture | f/32 |
| Filter size | 52 mm drop‑in filter |
| Weight | 2.55 kg (300 mm) – 5.36 kg (600 mm) |
Place the lens in a sealed plastic bag before moving it to a warmer place, allowing it to warm gradually before use.
Yes, EF1.4× II or EF2× II teleconverters can be used; when paired with the EF500mm f/4L IS USM or EF600mm f/4L IS USM, focus must be set to MF (manual focus).