Vortex VIPER HD, Instructions

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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, pull 
the diopter ring (found on the right 
eyepiece) toward your eye and adjust 
the diopter until the object is in focus. 
Then, push the diopter ring back down 

to lock your settings. 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.

The Viper HD 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.

Lens Covers

The Viper HD’s protective case provides safe storage between 
viewing sessions. The carry strap is already attached to the case.

Carry Case

a

ccessOries

Securely attach your binocular to the binocular strap:

Neckstrap

1. Thread the end of the 
strap from the bottom 
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 inside 
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.