Vortex D-3210 User manual

Ocular Lens

Diopter

Center Focus

Twist-up Eyecup

Strap
Attachment

BASIC OPERATION

Adjust the eyecups

The eyecups on a Diamondback® binocular twist up and down so
any viewer can see the full fi eld 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.

Tripod Adapter Socket

Objective Lens

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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