VIPER
®
HD
3
2
Ocular Lens
Strap
Attachment
Locking
Diopter
Center Focus
Reticle Focus
Twist-up Eyecup
Tripod Adapter Socket Objective Lens
BASIC OPERATION
Adjust the Eyecups
The eyecups on a Viper
®
HD binocular twist up and down so any
viewer can see the full field of view and enjoy comfortable
viewing—with or without eyeglasses.
When not using eyeglasses or
sunglasses, keep the eyecups
fully extended. For the best
viewing when viewing through
eyeglasses, twist eyecups down.
Adjust the Interpupillary Distance
The interpupillary distance (IPD) is the distance between the
centers of the left and right eye pupils. Match youre eyes’ IPD
to the bonocular’s so that you see a single image that is free of
shading.
IPD
Rotate the binocular barrels inward
or outward to line your eyes up with
ocular lenses.
Distance between the centers of
the ocular lenses.
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