Night Optics Falcon 6x Gen 3 Gated Long-Range Night Vision Binocular - Manual (Page 109)

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2-23 HAND-HELD OPERATION
Operate the goggles only under darkened
conditions or use the objective lens cap to cover
the objective lens for daylight conditions.
NOTE
When utilizing the NVG for driving purposes, the
NVG may not be used in the hand-held mode.
The goggles must be worn in the headmounted or
helmet mounted position.
(1) Ensure that batteries are installed per paragraph 2-6.
(2) Turn the power switch to ON.
(3) Adjust the interpupillary distance (Figure 2-1) by sliding
the eyepiece lenses together or apart so each eye can observe the
entire field-of-view at the same time. The eyepiece lenses adjust
independently.
NOTE
The sharpest image will be observed only when
the objective lens and both eyepiece lenses are
properly focused.
(4) Hold the goggles with your left hand and fold the left
eyecup over the eyepiece lens with your thumb or forefinger to
obstruct view through the left eyepiece lens. Rotate the right
diopter adjustment for the clearest view of the image intensifier
screen.
CAUTION