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Vortex VIPER HS Riflescope Manual

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HS
RIFLESCO PE
7 6
Select Viper HS riflescopes use a side focus adjustment which provides
maximum image sharpness and eliminates parallax error. The Viper HS
2.5–10x44 riflescopes do not use side focus adjustments and are pre-focused
at a distance of 100 yards.
Using the Side Focus
1. Be sure the reticle is correctly focused (see Reticle Focus on page 5).
2. Turn the side focus knob until the
target image is as sharp as possible. The
yardage numbers referenced on knob
should closely match the actual yardage
to the target.
3. Check for parallax error by moving
your head back and forth while looking
through the scope. The focus is correct if
there is no apparent shift of the reticle on the target. If you notice any
shift, adjust the focus knob slightly until all shift is eliminated.
Setting the side focus:
Parallax is a phenomenon that results when the target image
does not quite fall on the same optical plane as the reticle
within the scope. When the shooter’s eye is not precisely
centered in the eyepiece, there can be apparent movement of
the target in relation to the reticle, which can cause a small
shift in the point of aim. Parallax error is most problematic
for precision shooters using high magnification.
The Viper HS riflescope incorporates adjustable elevation and windage
turret dials with audible clicks. Each audible click moves the bullet’s point-
of-impact 1/4 of a minute of angle (MOA).
1/4 MOA closely corresponds to 1/4 inch at 100 yards, 1/2 inch at 200
yards, 3/4 inch at 300 yards—taking four (4) clicks to move the bullet’s
point-of-impact approximately one inch at 100 yards.
Windage and Elevation Adjustments
Note: After sight-in, you can re-align the zero marks on the turret dials
with the reference dots if you wish (see Indexing Adjustment Dials with
Zero Reset on page 12). Replace outer covers when done.
1. Remove the outer covers.
2. Turn the turret in the appropriate
direction: Up/Down or Left/Right as
indicated by the arrows.
3. Following the directional arrows, turn the
dials in the direction you wish the bullet’s
point-of-impact to go to.
To make adjustments:
Variable Power Adjustments
To change the magnification,
turn the magnification ring to the
desired level. The Vortex fiber
optic magnification indicator will
provide a low light reference for
magnification level.
Magnification
Scale
MagView
Indicator
Elevation Turret Dial
Windage Turret Dial
Adjust the side focus knob
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