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Vortex VIPER R-T Manual

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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.
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.
300m
300m
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