Nikon SMZ800N Instruction Manual page 42

 Activating and deactivating zoom click stops
Insert the hex wrench (nominal designation: 2) supplied with
the zooming body into the hole on the rear side of the right
zoom knob.
Turn the internal screw clockwise to activate click stops. Turn
it counterclockwise to deactivate click stops.
If a hex wrench cannot be easily turned
Loosen the zooming body fixing screw on the focus mount,
turn the zooming body to the right and left, and then use the
hex wrench if it cannot be used easily in the assembled
state.
Disconnect the cables connected to the SMZ1270i
Before enabling or disabling the zoom click stops on the SMZ1270i
Zooming Body, disconnect the USB cable and nosepiece cable
connected to the zooming body. Reconnect the cables after the
click stop setting.
Chapter 4
Functions and Operations of the Devices
Activating and deactivating zoom click stops
(The SMZ1270i is used as an example.)
28
Zoom knob
click stops:
ON
Zoom knob
SMZ 800N
CHI N A
MAD E I N
click stops:
OFF