Key facts
- Brand
- Canon
- Model
- EF400mm f
- Documents
- 4
- Languages
- ZH · EN
- Last added
- 2022-12-22
Start here
Canon EF300mm f/2.8L IS USM, EF400mm f/2.8L IS USM, EF500mm f/4L IS USM, EF600mm f/4L IS USM Telephoto Lens User Manual
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.
Canon EF400mm f specifications
| Lens Type | Super Telephoto Lens |
|---|---|
| Focus Motor | Ultrasonic Motor (USM) |
| Image Stabilizer | Yes (IS) |
| Special Element | Fluorite and Aspherical Elements |
All Canon EF400mm f documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
- CHI-1 EF400mm f/4 DO IS II USM Lens User Manual 4 p
- Canon EF400mm f/4 DO IS USM Lens User Manual 17 p
- Canon EF135mm f/2L USM, EF200mm f/2.8L II USM, EF300mm f/4L USM, EF400mm f/5.6L USM User Manual 15 p
- Canon EF300mm f/2.8L IS USM, EF400mm f/2.8L IS USM, EF500mm f/4L IS USM, EF600mm f/4L IS USM Telephoto Lens User Manual 22 p
Questions answered in these manuals
What does the 'DO' designation stand for?
It stands for Diffractive Optical element.
Is this lens waterproof and dustproof?
Yes, it has excellent sealing against dust and water droplets, but it is not completely weather-sealed.
Can I look at the sun through this lens?
No. The manual warns not to view the sun or bright light sources through the lens or camera, as it can damage eyesight and cause fire.
How do I switch the lens to manual focus?
Set the focus‑mode switch to MF and then turn the focus ring to focus manually.
What safety precautions should be taken when using these lenses?
Avoid pointing the lens at bright light sources, keep it away from high temperatures, and handle contacts carefully to prevent damage.
From: Canon EF135mm f/2L USM, EF200mm f/2.8L II USM, EF300mm f/4L USM, EF400mm f/5.6L USM User Manual
What are the available autofocus modes?
The lenses support One‑Shot AF, AI Servo (continuous) AF, and Manual Focus (MF) modes.
From: Canon EF135mm f/2L USM, EF200mm f/2.8L II USM, EF300mm f/4L USM, EF400mm f/5.6L USM User Manual