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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
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Summary of Contents for Vortex Viper 8x28 R/T
- Page 1 Binocular Adjustments ....3 Using the Viper R/T Reticle ... . 6 Caring for the Lenses .
- Page 2 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.
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Page 3: Focusing The Binocular
Adjusting the Reticle Focus 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... - Page 4 Using the Viper R/T Reticle Reading the R/T Reticle The R/T reticle is based on a form of angular measurement called the milliradian (mrad for short). These angular measurements allow a user to calculate ranges when comparing the reticle to objects of known dimension.
- Page 5 Precision Ranging with mrads Mrad measurements are very effective for ranging using simple formulas. Knowing the size of the target or a nearby object is essential to using these formulas. Target Size (Yards) x 1000 Range (Yards) Measured mrads Target Size (Inches) x 27.8 Range (Yards) Measured mrads Target Size (Meters) x 1000...
- Page 6 300m Caring for the Lenses Maintain the optical brilliance of the Viper R/T binocular by keeping the lens surfaces free of dirt, oils, and dust. Protect Lenses While Out in the Field Make use of the rainguard to protect the lenses when not viewing.
- Page 7 The Neckstrap Attach the padded neckstrap to the binocular in three simple steps. Begin with the right barrel of the binocular and repeat the process for the left barrel. 1. Push a few inches of the strap through the neckstrap attachment point on the binocular.
- Page 8 • No warranty card needed • No receipt needed Rest assured, if this binocular should ever require repair, all you need to do is contact Vortex for absolutely free service. Call 800-426-0048 or e-mail service@vortexoptics.com. Vortex Optics 2120 West Greenview Drive Middleton, Wisconsin 53562 Visit Vortex Optics at vortexoptics.com.
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