Vortex Optics VIPER 2-7X32 - VERSA-PLEX C3 - Manual (Page 4)

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Magnification
Indicator Bar
Magnification
Scale
Using 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.
Select Viper riflescopes (PA models) feature a side focus dial to adjust
for maximum image sharpness and eliminate parallax error. Models
without the side focus adjustment and are factory-focused at a distance
of 100 yards.
Setting the side focus:
1. Be sure the reticle is correctly focused
(see Reticle Focus on page 5).
2. Turn the side focus adjustment
dial until the target image is as sharp
as possible. The yardage numbers
referenced on the dial 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.
Windage and Elevation Adjustments
Your Viper riflescope features 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 1/16 inch at 25 yards, 1/8 inch at 50 yards, 1/4 inch at
100 yards, and 1/2 inch at 200 yards.
Example
It will take four (4) clicks to move the bullet’s point-of-impact
approximately one inch at 100 yards.
To make turret adjustments:
1. Remove the outer turret 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.
TIP: 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 the outer covers when done.
Variable Power Adjustments
Rotate the indicator bar to the desired
magnification.
Elevation Turret Dial
Windage Turret Dial
Adjust the side focus dial