IMPACT® 850 SPECIFICATIONS
MIN. RANGE DEER RANGE TREE RA NGE REFLECTIVE RANGE
5 yd.
(4 m)
Accuracy: + /- 1 yards @ 100 yards
Maximum Angle Reading: +/- 60 degrees
Measuring Time: < 1 second
Battery Life: ~5000 single range measurements
Operating Temperature: 14° to 131°F (–10° to 55° C)
Magnification: 6x
Objective Lens: 20 mm
Eye Relief: 15 mm
Diopter: +/- 3
Up to 400 yd.
(365 m)
Up to 550 yd.
(502 m)
Up to 850 yd.
(777 m)
IMPACT® 850 LASER RANGEFINDER
The Impact® 850 is an extremely effective anglecompensated laser rangefinder for archers and rifle
shooters. Using the primary HCD (Horizontal Component
Distance) mode, it provides key angle compensated range
information required by the vast majority of shooters in a
simple, quick to read display.
The Impact
provides LOS (Line of
Sight) mode and Scan
feature along with
adjustments for reading in
yards or meters.
Images are fo r represent ation only. Product may var y slightly from what is sh own.
®
850 also
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Menu Button
Measure But ton
Batter y
Compartment
Adjust Focus
with Eyecu p
Lanyard
Attachment
Sockets
BASIC OPERATION
Install Battery
Open the battery compartment
and install the CR2 battery
included with the Impact® 850.
Power Up
Once you install the battery,
the Impact 850 is in Ready
Condition—the normal power-off
condition when not ranging. To
power up the Impact 850 from
Ready Condition and prepare
for ranging, press and release
the Measure button. The HCD or
LOS ranging screen will display.
The Impact 850 will power
down automatically after ten
seconds of non-use.
Focus
Turn the eyecup in or out until
image is sharp.
5 4
Remove batte ry
compartment cover.
Install batter y with positive
side facing outwards.
Batter y Power Indicator
MODE SELECTION
Your Impact® 850 is factory set to the angle compensating
HCD mode and yards.
To change modes: After the Impact 850 is powered up,
activate the Mode Selection by pressing and holding the
Menu button for at least four seconds. Once the Mode
Selection screen displays, release the button.
As you progress through Mode Selection, you may exit at
any time and save your settings by pressing and holding the
Menu button for at least four seconds—the Impact 850 will
then return to power-up condition.
Use the Menu button
to activate the Mod e
Selection displays.
Use the Measur e
button to tog gle
through each Mo de
Mode Selection Display
Selection option.
SET AND SAVE MODE SELECTIONS
1. Choose between the HCD and LOS Modes.
After activating the
Mode Selection, press
the Measure button to
toggle between the HCD
and LOS displays. Press
the Menu button to save
Choose Be tween HCD and LO S
your desired choice and
move to the Yards/Meters
selection screen.
2. Choose between Yards and Meters Display.
After activating the Mode
Selection, press the
Measure button to toggle
between the Yards and
Meters display. Press
the Menu button to save
your desired choice.
To exit Mode Selection and save settings, press and hold
the Menu button for four seconds. Settings will also save
when the Impact
®
850 powers down automatically.
Choose Be tween Yards and Meter s
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RANGING
With the Impact® 850 powered up,
position the crosshair on the target object
and press and release the Measure
button to get the distance measurement.
If the laser is not able to range due to
the reflectivity of the target, you will see
a display similar to that shown here. To
range a new target, simply re-aim and
press the Measure button again.
SCAN RANGING
With the Impact 850 powered up,
activate Scan Ranging by pressing and
holding the Measure button down. A
blinking “S” will appear in the lower left
corner.
Keeping the button depressed will
continuously measure distance as you pan
the crosshair back and forth across target
objects. Releasing the Measure button will
return laser to the Power Up Condition.
No Reflectivit y
Displayed
HCD Scan
LOS Scan
RANGING MODE EXPLANATIONS
The Impact® 850 provides two range modes: HCD
(Horizontal Component Distance) and LOS (Line of Sight).
Both modes offer a Scan feature.
HCD Mode
The Impact 850’s HCD range display is intended to be the
primary mode—used for most rifle and archery shooting
conditions. The yardage number displayed is the critical
horizontal component distance.
500 Yard Line of Sight
Horizontal Component Distance
385 Yard s
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Using the HCD Mode
Use the HCD range mode in the following situations:
• Rifle shooting on level ground at any range.
• Rifle shooting out to ranges of 800 yards with mild slopes
(less than 15 degrees).
• Rifle shooting out to ranges of 400 yards with moderate
slopes (15 to 30 degrees).
• For all archery shooting.
Note: See page 12 for method of reading slope degree in
LOS mode.
The displayed HCD yardage number
is corrected for shot angle and needs
no extra user input; shooters simply
use the appropriate level ground bullet
drop and wind adjustment for the range
displayed and shoot. Archers use the
appropriate level ground sight pin for
the range displayed and shoot.
Use 525 yard level
ground drop dat a to
make shot.
LOS Mode
The Impact® 850’s LOS (Line of Sight) mode is intended
for rifle shooters who are using slope correcting ballistic
drop data cards, ballistic cell phone applications, or other
ballistic programs and who are shooting at distances beyond
500 yards and with slopes greater than 15 degrees. Most
shooters and archers will not need the LOS mode.
The range number displayed in LOS mode is the actual
line of sight range with no ballistic correction for slope.
Most of the commonly used ballistic devices can provide
independent slope correction for bullet drop data and
require actual line of sight range input. Using the LOS
range when calculating bullet wind drifts under these steep
slope/long range conditions will provide a higher degree of
accuracy than using the HCD range.
To use, simply input the LOS range number into the
electronic device or use the LOS range when referencing
ballistic drop cards with slope correction.
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LOS Mode – Incline
When in LOS mode, an additional number is displayed below
the yardage number. This number is slope shown in degrees.
The slope incline number can be used with drop charts or field
cards to calculate precise bullet drops in mountainous terrain.
SCAN FEATURE
The Scan feature can be used to range moving targets or
help range smaller targets on uniform backgrounds in either
HCD or LOS modes. Once powered up, press and hold the
Measure button and scan the laser back and forth, watching
for changes in the yardage number as the crosshairs move
across the target object. A blinking “S” display indicates
Scan Ranging is activated.
LOS Range
Scanning to get range:
Incline Angle
Scan back and fo rth, watching for yardage number to display or chang e.
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LANYARD
The lanyard provides a secure
way to carry your rangefinder.
Loop lanyard thr ough
attachment s ockets.
MAINTENANCE
• Use a lens brush to remove dust or grit from lenses.
• Use a clean lens cloth or tissue to remove smudges or
smears from lenses.
• Store rangefinder in a dry location away from direct sunlight.
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
objects. Under ideal conditions, the Impact® 850 can be
expected to range a large reflective object out to 850 yards
and deer-sized game out to 400 yards.
RANGEFINDING TIPS
• Light colors will usually reflect better than dark ones.
• Be aware that snow, rain, and fog will have adverse effects
on ranging ability.
• Shiny, reflective surfaces will usually reflect better than
dull, textured surfaces. Animal hair will not reflect as well
as a hard surface.
• Ranging under cloud cover can improve laser performance
compared to bright sunny conditions.
• Solid objects, such as a rock, will reflect better than bushes.
• Flat surfaces perpendicular to the laser pulse will reflect
better than curved surfaces or surfaces angled in relation
to laser pulse.
• Ranging over water can sometimes cause false reflections
and readings.
• At longer distances, large objects will be easier to range
than small objects.
• If you are having difficulty ranging an animal or object, try
ranging a different nearby object, or use the Scan feature to pan
back and forth while watching for changes in range number.
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FCC REQUIREMENTS
The user’s manual or instruction manual for an intentional or
unintentional radiator shall caution the user that changes or
modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the
equipment.
Note: This equipment has been tested and found to comply with
the limits for a Class B digital device, pursuant to part 15 of the
FCC Rules. These limits are designed to provide reasonable
protection against harmful interference in a residential
installation. This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in accordance
with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference
will not occur in a particular installation. If this equipment does
cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, the user
is encouraged to try to correct the interference by one or more of
the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
SAFETY AND PRECAUTIONS
Do not stare into beam or view directly without laser eye
protection. Staring continuously into beam for prolonged
periods of time could cause harm to your eyes. If used
properly, this device is safe for your eyes and laser eye
protection is not needed.
• Use the correct battery (CR2) and proper battery orientation.
• Do not look at sun.
• Do not activate Menu or Measure buttons while aiming at
eye or looking into objective lens.
• Do not disassemble.
• Do not allow children to play with unit.
AVOID EXPOSURE LASER RADIATION IS EMITTED FROM THIS APERTURE
LASER RADIATION AVOID EYE EXPOSURE CLASS 3R LASER PRODUCT
MAXIMUM OUTPUT 895nm, 5.0mW max., 850Hz
THIS PRODUCT COMPLIES WITH IEC 60825-1:2014-05 Ed. 3.0
THIS PRODUCT COMPLIES WITH 21CFR SUBCHAPTER J PARTS 1040.10 AND 1040.11
EXCEPT FOR DEVIATIONS PURSUANT TO LASER NOTICE NO.50 DATED JUNE 24, 2007.
Sheltered Wings, Inc. One Vortex Drive, Barneveld, Wl 53507 January 2017
CAUTION—Use of controls, adjustments or performance of
procedures other than those specified herein may result in
hazardous laser radiation exposure.
17 16
VIP WARRANTY
OUR UNCONDITIONAL PROMISE TO YOU.
We promise to repair or replace
the product. Absolutely free.
Unlimited
Unconditional
Lifetime Warranty
Learn more at www.VortexOptics.com
service@VortexOptics.com • 800-426-0048
Note: The VIP Warranty does not cover loss, theft, deliberate
damage, or cosmetic damage not affecting product performance.
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M-00027-3
® Registered Trademark and TM Trademark of Vortex Optics
© 2018 Vortex Optics
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