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Vortex Optics VIPER R/T 10X50 BINOCULAR User Manual

Page 6

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Other dimensions of the silhouettes may be used to
compare to objects of known dimension to obtain
range estimation. In this
example, a deer is ranged
using the silhouettes. Using a
deer’s typical back-to-brisket
dimension of 17 inches, the
17-inch shoulder height of the
silhouettes can be used for quick
range estimation.

10

11

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

Caring for the Lenses

Make use of the rainguard to protect the lenses when
not viewing. Store the Viper R/T binocular in its
carry case.

Keep Lenses Clean

Along with normal use comes the need to clean the
binocular lenses. Follow these guidelines for cleaning:

Cleaning fluid and optical paper can also be used. However, you should
never use facial tissue, heavy cotton, or flannel clothing on lenses—these
materials can scratch the lens surfaces.

Other cleaning options:

Quick Ranging with Silhouettes

The human silhouettes used in the Viper R/T reticle are
based on an average 20-inch shoulder
width and 11-inch head width. To use,
simply match the person being ranged to
the closest silhouette in shape and read the
indicated yardage. As before, best accuracy
will be obtained by bracing the arms or
using a tripod mount.

1. Remove any dust or grit from the lenses before
wiping. Use a can of pressurized air or a soft camel
hairbrush (acrylic optical brushes also work well).

2. Clear lens of smudges, fingerprints, or eyelash
oil. Fog the lenses with your own breath and wipe
with the non-abrasive lens cloth included with the
Viper R/T binocular.

300m

300m