Zoom Touch Adjustment Ring - Canon EF100-400mm f/4.5-5.6L IS II USM Lens Instructions For Use Manual

4. Zooming and Adjusting Zooming Resistance
To zoom, rotate 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.
To prevent unintended zooming when not
● ●
shooting, we recommend turning the adjustment
ring towards the word TIGHT until it stops.

Zoom touch adjustment ring

The operational feel (tightness) of the zoom ring
can be adjusted as desired. Turn the adjustment
ring towards the word SMOOTH to reduce the
zooming touch, or towards TIGHT to increase it.
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