Vortex Optics VIPER 10X28 BINOCULAR - Manual (Page 3)

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Properly focus the binocular
For the best views, follow this two-step process to properly adjust
the center focus and diopter. Choose an object that is about 20
yards away from you and stay in the same spot until you have
adjusted the binocular for your eyes.
1. Adjust the center focus—start by closing your right
eye or covering the right objective
lens with your hand. Focus your
left eye on the object and adjust the
center focus wheel until the image
is in focus. Leave the center focus
in this position as you adjust the
diopter.
2. Adjust the diopter—start by closing your left eye
or covering the left objective lens
with your hand. Look through your
right eye and adjust the diopter ring
(found on the right eyepiece) until
the object is in focus. Make note of
this diopter setting in case you need
to set it again. From this point on,
you will only need to use the center focus wheel.
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ccessOries
Carry Case
The Viper’s protective case provides safe storage between viewing
sessions. The carry strap is already attached to the case.
Lens Covers
The Viper comes with a rainguard for the ocular lenses and
tethered objective lens covers. Use these covers to protect the
lenses whenever you are not viewing.
Neckstrap
Securely attach your binocular to the binocular strap:
1. Thread the end of the
strap from the bottom
and up through the strap
attachment loop. 3. Adjust the overall
length and pull the strap
webbing tight so it is
secure within the buckle. 2. Hold the buckle
and thread the end
of the strap through
the buckle.
Note: Please do not thread a metal ring directly onto the strap attachment
loop when attaching rings or clips for other after-market equipment. Instead,
use nylon zip ties according to the manufacturer’s instructions.