●●After the focus distance has been preset, turning
the playback ring to a different zoom position or
changing the internal extender setting will result
in an out of focus picture. Therefore, use the
focus preset function after zooming is completed
and the internal extender has been set.
●● The focus preset function will not operate for a
few seconds after setting the internal extender
(the amount of time varies depending on the
●● After setting the internal extender, please press
the shutter button halfway before setting or using
the focus preset.
●● When turning the playback ring, keep your finger
away from the shutter button. In One-Shot AF
mode, the exposure will be locked when you
press the shutter button halfway and focus is
achieved. So if you press the shutter button
halfway while turning the playback ring, the
exposure may not be correct.
●● When not using the focus preset, set the switch
●● The focus preset function will not work while a
Live View image is displayed on the camera.*
By turning the playback ring to the left or right,
the focus shifts as far as the preset distance.
Focus will shift freely released of AF focusing
while the playback ring is still turned.
●●If the focus preset switch was set to , the beeper
will sound twice.
Setting the focus mode switch to power focus
(PF) when using the lens with the EOS-1D X,
EOS 5D Mark III, or EOS REBEL T4i/650D
enables focus change at a slow set speed
during movie shooting. Also, you can make a
2-step change in focus shift speed depending on
the angle that the playback ring is rotated to.
* Not applicable to the EOS-1D X, EOS 5D Mark III, or
EOS REBEL T4i/650D
In the following cases, the focusing distance scale
(p. 18) will move slightly. It will not affect the image.
• When you press the focus preset button.
• When you turn the playback ring.
< How to Focus at the Preset Distance >