Canon EF135mm f/2L USM, EF200mm f/2.8L II USM, EF300mm f/4L USM and EF400mm f/5.6L USM lenses are high-performance telephoto lenses for EOS cameras with UD lenses and USM for high-speed and silent autofocus.
The manual covers safe handling, installation and removal procedures, and proper use of the EF135mm f/2L USM, EF200mm f/2.8L II USM, EF300mm f/4L USM, and EF400mm f/5.6L USM lenses. It includes warnings about bright light, temperature limits, and hazardous materials, as well as detailed diagrams for mounting and tripod adapters.
Operational sections describe the various autofocus modes (One‑Shot AF, AI Servo, Manual Focus), minimum focusing distances, depth‑of‑field scales, and the lens specifications such as focusing range, maximum magnification, and weight.
| EF135mm f/2L USM focusing range | 0.9 m – 16 m |
|---|---|
| EF200mm f/2.8L II USM focusing range | 1.5 m – 3.5 m |
| EF300mm f/4L USM focusing range | 2.5 m – 6 m |
| EF400mm f/5.6L USM focusing range | 3.5 m – 8.5 m |
| Maximum magnification (EF135mm – EF400mm) | 0.19 / 0.16 / 0.13 / 0.12 |
Avoid pointing the lens at bright light sources, keep it away from high temperatures, and handle contacts carefully to prevent damage.
The lenses support One‑Shot AF, AI Servo (continuous) AF, and Manual Focus (MF) modes.
The EF300mm f/4L USM lens can focus as close as 2.5 m.