Canon EF 70-300mm f4-5.6L IS USM - Manual (Page 6)

ENG-5
3. Zooming
To zoom, turn the zoom ring.
Be sure to finish zooming before focusing.
Zooming after focusing can affect the focus.
Especially for shooting distances shorter than 3 m
/ 9.8 ft., zooming to another focal length will
greatly change the focus.
2. Setting the Focus
Mode
To shoot in autofocus (AF) mode, set the focus
mode switch to AF.
To use only manual focusing (MF), set the focus
mode switch to MF, and focus by turning the
focusing ring. The focusing ring always works,
regardless of the focus mode.
After autofocusing in ONE SHOT AF mode, focus
manually by pressing the shutter button halfway
and turning the focusing ring. (Full-time manual
focus)
COP
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