Vortex V828RT User manual

With a tough and durable roof prism design and brilliant optics, the Viper R/T

can be relied on in the worst conditions thanks to Vortex’s premium XD glass and XR lens coatings.

The 28mm Viper R/T binocular is equipped with the Vortex R/T Ranging reticle, designed to assist the user in calculating distances.

Binocular Adjustments . . . . . . . . . . . . . . . 3

Using the Viper R/T Reticle . . . . . . . . . . . . 6

Caring for the Lenses . . . . . . . . . . . . . . . . 11

Accessories . . . . . . . . . . . . . . . . . . . . . . . . 12

Vortex Service and Repair Policy . . . . . . . 14

Optical Quality

The Viper R/T binocular features fully multi-coated optics and phase-corrected prisms for the ultimate in light transmission and brightness in any light condition.

Rugged Design

The 28mm Viper R/T binocular has a rugged roof prism design. An internal focus mechanism, o-rings at all open points, and argon purging contribute to the waterproof, dust proof, internally fogproof design of this binocular.

Adjustable Winged Eyecup

Diopter Ring

Roof Prism Housing

Objective Lenses

Center Focus

Reticle Focus

Neckstrap Attachment Point

Binocular Adjustments

Adjusting the Eyecups

The Viper R/T binocular feature winged eyecups that block out stray light and rotate for a custom fit. These eyecups roll up and down so any viewer can take advantage of the long eye relief and enjoy comfortable, full-field viewing even when wearing eyeglasses or sunglasses.

Without eyeglasses or sunglasses, keep the eyecups fully extended.

With eyeglasses or sunglasses, roll down the eyecups.

Adjusting 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 by

Adjust the IPD for a custom

fit and better views.

IPD

rotating the binocular barrels inward or outward until you see a single image that is free of shading.

Focusing the Binocular

Adjusting the Reticle Focus

Choose an object that is about 20 yards away from you and follow this two-step process to properly adjust the focus. Be sure to stay in the same spot until you have adjusted both the center focus and diopter.

1. Adjust the center focus

Start by closing your right eye or covering the right objective lens with your hand. 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 until the object

is in focus. Make note of this

diopter setting in case you need

to set it again.

The reticle focus is located on the left ocular as you hold the binocular. This focus is used to adjust the reticle image until it is clear and sharp. Focusing the reticle is easiest when closing the right eye while setting this focus. When looking at a white wall or the sky, adjust the reticle focus until the reticle image is clear and sharp.

Reticle Focus

Diopter

Once set for a particular user, the reticle focus can be left in place.

From this point on, you will only need to use the center focus dial.

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.

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