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Adjust the eyecups
The eyecups on a Viper® HD binocular twist up and down so any
viewer can see the full field and enjoy comfortable viewing—with
or without eyeglasses.
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.
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’s protective case provides safe storage between
viewing sessions. The carry strap is already attached to the case.
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.
Securely attach your binocular to the binocular strap:
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
Maintain the optical brilliance of the Viper HD binocular by
keeping lens surfaces free of dirt, oils, and dust.
Protect lenses while out in the field
Make use of the provided eyepiece and tethered objective lens
covers to protect the lenses when not viewing. If the optics are
exposed to moisture, keep the caps off and allow the optics to dry
out completely before putting them in the case for storage.
Keep lenses clean
In order to enjoy the best views through your binocular, take
time to regularly clean the exterior lenses:
1. Remove any dust or grit from lenses before wiping. Use a can
of pressurized air, soft camel hair brush, or an acrylic optical brush.
2. Clear lenses of smudges, fingerprints, or eyelash oil. Fog the
lenses with your own breath, then use a non-abrasive lens cloth to
clean the lenses.
Caution: Binoculars are not intended for looking at the sun, or any
other intense light source. Such viewing could damage the retina and
cornea of your eyes—even to the point of causing blindness.
The VIP Warranty
We build optics based on our commitment to your absolute
satisfaction. That’s why Vortex products are unconditionally
guaranteed and we make this Very Important Promise to you—a
Very Important Person.
Rest assured that in the event
your Viper HD binocular becomes
damaged or defective, Vortex Optics
will repair or replace the binocular
at no charge to you. Call Vortex
Optics at 800-426-0048 for prompt,
professional, and friendly service.
2120 West Greenview Drive
Middleton, WI 53562
Visit www.vortexoptics.com for more information. Canadian
customers may visit www.vortexcanada.net for customer service
Note: The VIP warranty does not cover theft, loss, or deliberate
damage to the product.
is part of the Marketing team at Optics Trade. She is a nature and astronomy enthusiast, that’s why you’ll find most of her articles in these two categories.