Vortex IMPACT 4000 - RANGEFINDING TIPS; Factors Affecting Ranging Accuracy; MAINTENANCE; Cleaning and Storage

IMPACT
®
4000
44 45
MAINTENANCE
Cleaning
Your Impact
®
4000 requires very little routine
maintenance other than periodically cleaning the
exterior lenses. The exterior may be cleaned by wiping
with a soft cloth. When cleaning the lenses, be sure to
use products that are specifically designed for use on
coated optical lenses.
• Be sure to blow away any dust or grit on the lenses
prior to wiping the surfaces.
• Using your breath, or a small amount of water or
pure alcohol, can help remove stubborn dried
water spots.
Lubrication
All components of the Impact
®
4000 are permanently
lubricated, so no additional lubricant should be applied.
Note: Other than to remove the Battery Cap, do not
attempt to disassemble any components of the rangefinder.
Disassembling of rangefinder may void warranty.
Storage
If possible, avoid storing your rangefinder in direct
sunlight or any very hot location for long periods of
time. We recommend using the included sure fit cover
for added protection during storage and transportation.
RANGEFINDING TIPS
Laser rangefinders work by emitting a brief pulse of
light aimed at a target object. Distance is determined
by the amount of time taken for the light to emit and
return to the laser’s internal receiver. A laser’s ability
to read range can be affected by many things, mostly
relating to the target object.
• Light colors will usually reflect better than dark ones.
• Snow, rain, air quality, and fog will have adverse
effects on ranging ability.
• Dull or textured surfaces will not reflect as well as a
hard, shiny surface.
• Ranging under cloud cover can improve laser
performance compared to bright, sunny conditions.
• Solid objects, such as rocks, will reflect better
than bushes.
• Flat surfaces perpendicular to the laser will reflect
better than curved surfaces or surfaces angled in
relation to the laser.
• Ranging over water can sometimes cause false
reflections and readings.
• At longer distances, larger objects will be easier to
range than smaller objects.
• Using a stable position or platform with the Impact
®
4000 will greatly increase your ability to range small
targets at longer distances.
• If you are having difficulty ranging an animal or
object, try ranging a different nearby object or
switch to ELR Mode.