Canon EF 200-400mm f4L IS USM Extender 1.4x - Manual (Page 16)

ENG-15
10. Internal Extender Switch
The extender switch lever allows you to set the focal distance of the lens to 1.4x.
Slide the extender switch
lock toward the front of the
lens.
● ● This allows the extender
switch lever to move.
Use the extender switch
lever to select a focal
distance of either 1x or 1.4x.
● ● This allows you to change the
focal distance of the lens to
either 1x or 1.4x.
Slide the extender switch
lock toward the back of the
lens.
● ● This locks the extender switch
lever in place.
The extender switch lock prevents the extender switch lever from being moved inadvertently. It does not
secure the switch lever to the side edge. Be sure to use the lock even when the switch lever is set at 1x in
order to prevent it from being moved inadvertently.
When the internal extender is used (set to 1.4x), the AF speed will become slower to retain proper control.
COP
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