Vortex Optics VIPER PST 2.5-10X44 RIFLESCOPE - Manual (Page 6)

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RIFLESCOPE
Battery Cap
Variable Power Adjustments
To change magnifications, turn the magnification ring to the desired
level. The Vortex MagView system will provide a low light reference for
magnification level.
Illumination Adjustments
The Vortex Viper PST riflescopes
use a variable intensity reticle
illumination system to aid
in low light performance. To
activate the illumination, rotate
the adjustment knob in either
direction.
The illumination knob allows for
10 levels of brightness intensity; an
off click between each level allows
the shooter to turn the illumination off and return to a favored intensity
level with just one click.
Replacing the Battery
1. Unscrew the outer cap with a
coin.
2. Remove the battery.
3. Replace with a new CR 2032
battery.
4. Re-install the outer battery cap and be sure to fully tighten it down.
Customizable Rotational Stop (CRS Tm )
Vortex Viper PST riflescope elevation turrets incorporate the unique CRS
rotation stop feature. After the rifle is sighted in, the design of the CRS
allows a shooter to quickly and easily return to an original zero point when
using the elevation turret to dial-in temporary bullet drop corrections.
The CRS feature is particularly useful when dialing large multi-revolution
elevation corrections. Without this feature, the shooter must pay very
careful attention when dialing these large corrections. If the shooter loses
track of the number of revolutions, the original zero point may become
lost when returning the adjustment.
Viper PST riflescopes equipped with
the CRS allow the elevation dial to be quickly spun back to original zero
without having to carefully count revolutions or clicks.
Once the CRS shims are installed after sight-in, the elevation dial will
stop turning shortly past the original zero point when being returned
(turning clockwise direction) from a temporary elevation adjustment.
The shooter can then turn the elevation knob a partial turn in a counter-
clockwise direction until the zero reference and radius bar are correctly
aligned—achieving the original zero point.
See CRS shim installation in the
Bore Sighting and Final Range
Sight-in sections.
CRS Shims
MagView
Illumination
Knob
Magnification
Ring