Key facts
- Brand
- Canon
- Model
- EF70-300MM
- Category
- Other Electronics
- Industry
- Electronics
- Documents
- 3
- Languages
- ZH
- Last added
- 2012-03-20
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Canon EF70-300mm f/4-5.6L IS USM User Manual
The EF70-300mm f/4-5.6L IS USM is a high‑performance telephoto zoom lens with image stabilization and ultrasonic motor (USM) designed for EOS cameras. It offers a versatile focal range and robust sealing for dust‑ and moisture‑resistance.
The manual covers safety precautions, lens installation and removal, focusing mode settings, use of the lens hood, zoom‑ring lock operation, cleaning of electronic contacts, and detailed technical specifications. It also provides guidance on handling the lens in extreme temperatures and proper storage. This manual is written in Chinese.
Canon EF70-300MM specifications
| Focal length | 70-300 mm |
|---|---|
| Maximum aperture | f/4-5.6 |
| Filter diameter | 58 mm |
| Dimensions | 765 × 142.8 mm |
All Canon EF70-300MM 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 does USM stand for?
USM indicates an Ultrasonic Motor for fast, silent focusing.
Can I manually focus after autofocus in ONE SHOT AF mode?
Yes. After autofocus, half‑press the shutter button and turn the focus ring to adjust focus manually.
What should I do to prevent condensation when moving the lens between cold and warm environments?
Place the lens in a sealed plastic bag before moving it from a cold to a warm environment, then let it warm gradually before removing the bag.
How should I clean the lens's electronic contacts?
Use a soft cloth to gently clean the contacts if they become dirty or fingerprinted.
Can the zoom ring be locked?
Yes, the zoom ring can be locked at the widest‑angle position to prevent the lens from extending during transport.