Vortex Optics VIPER 10X28 BINOCULAR User Manual

Ocular Lens

Diopter

Center Focus

Twist-up Eyecup

Strap
Attachment

Basic OperatiOn

Adjust the eyecups

The eyecups on the Viper®compact binocular twist up and
down so any viewer can see the full field 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 the IPD of your
eyes to that of the binocular so that you see a single image that is
free of shading.

Objective Lens

Please read the entire manual before using your new optic.

IPD

Distance between the centers
of the ocular lenses.

Rotate the binocular barrels
inward or outward to line your
eyes up with ocular lenses.

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