Adjustment Ring; Zoom Ring - Canon RF 100-500mm F4.5-7.1 L IS USM Instructions Manual

4. Adjusting the Zoom and Zoom Ring Operational Feeling
To zoom, turn the zoom ring.
Be sure to finish zooming before focusing.
z
Zooming after focusing can affect the focus.
Blurring may temporarily occur if the zoom ring is
z
quickly turned.
Please be careful not to let your fingers get
z
caught in between the lens' front and the zoom
ring when zooming.

Adjustment ring

You can adjust the operational feeling (weight
of movement) of the zoom ring to a preferred
level. Turn the adjustment ring toward SMOOTH
to lighten the feeling, and toward TIGHT to
strengthen it.
It is recommended that the adjustment ring is
z
turned fully to the TIGHT setting when not in
use to prevent the front of the lens from being
unintentionally extended.
If the lens is aimed upward or downward in the
z
TELE setting with the adjustment ring set at
SMOOTH, there are cases in which the lens will
contract to the WIDE setting. Please be careful
not to let your fingers get caught in between the
lens' front and the zoom ring.
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