Key facts
- Brand
- Canon
- Model
- 4L USM
- Category
- Other Electronics
- Documents
- 3
- Languages
- EN · ZH
- Last added
- 2012-03-20
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Canon EF135mm f/2L USM, EF200mm f/2.8L II USM, EF300mm f/4L USM, EF400mm f/5.6L USM User Manual
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.
Canon 4L USM specifications
| Focal length | 70-200mm |
|---|---|
| Maximum aperture | f/4 |
| Focusing motor | USM |
All Canon 4L USM documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
What is the focal length range of the lens?
The lens covers a focal length range of 70‑200 mm.
What is the maximum aperture of the lens?
The maximum aperture is f/4.
How should the lens be handled when moving between cold and warm environments?
Place the lens in a sealed plastic bag before moving, let it warm gradually, and avoid exposing it directly to sunlight or high temperatures.
What filter size is recommended for this lens?
A 77 mm filter (Canon protective filter) is recommended.
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