Canon RF 28mm F2.8 STM Instructions Manual page 8

2. Focusing/Control ring
The focusing/control ring can be used as either a
focusing ring or a control ring.
Focusing/Control ring
Focus mode/control selector switch
Use as a Focusing Ring
Set the focus mode/control selector switch to AF
or MF.
To shoot in autofocus (AF) mode, set the focus
mode/control selector switch to AF. Table*1
To use only manual focusing (MF), set the focus
mode/control selector switch to MF, and focus by
turning the focusing ring (focusing/control ring).
Table*2
Table: List of Focus Mode and Focusing/Control
Ring Functions Using the Focus Mode/
Control Selector Switch
*1 AF
Focus mode AF
Focusing/control
Focusing ring Control ring Focusing ring
ring functions
Use as a Control Ring
Set the focus mode/control selector switch to
CONTROL. Table*3
Set the control ring function using the camera's
menu. The control ring can be assigned the
functions that are commonly used with cameras,
such as shutter speed and aperture settings.
Please refer to the camera's instructions for
details on how to use the control ring.
Focus mode/
Control selector switch
*3 CONTROL *2 MF
*4 AF/ *5 MF MF
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