Leupold GX-2c User manual

GX-2c
RANGEFINDER
OPERATING INSTRUCTIONS

TABLE OF CONTENTS
About Leupold..........................................01
Accuracy ...............................................02
How GX Rangefinders Work ..............................02
GX Rangefinder Specifications............................06
Operation ..............................................07
Using Prism Lock........................................22
Trouble Shooting ........................................23
Cleaning/Maintenance ...................................24
Warranty/Repair ........................................24
French Language Instructions ............................26
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INTRODUCTION
Congratulations on your purchase! Your new Leupold® GX-2c
rangefinder has been crafted by our engineers and designers to
outperform the competition and provide you with years of solid
performance on the course. To ensure proper function for the life of
the product, please review the following instructions detailing the
correct use of your GX digital laser rangefinder before operating.
The GX-2c is a revolutionary device that uses a ballistic algorithm
and advanced digital electronics to guarantee accurate ranges
on the course. The DNA® (Digitally eNhanced Accuracy™) engine
easily ranges the longest par 5 using advanced signal processing
techniques, while the True Golf Range™ (TGR®) algorithm provides
hit-to distances accurate to less than a yard on high and low
angled shots. Additional features include PinHunter 3 technology,
Club Selector, Prism Lock, and an inclinometer.
The GX-2c provides the same incredible durability, ruggedness,
and speed of our other GX rangefinders, while delivering
improved accuracy and efficiency so you can golf with total
confidence, shot after shot.

1
ABOUT LEUPOLD & STEVENS, INC.
It’s a decidedly American story: in 1907, a young German immigrant
named Fred Leupold set up a one-man shop at 5th and Oak Streets in
Portland, Oregon, repairing optics for surveying equipment. The small
company survived the First World War and the Great Depression, however,
it was the Second World War that would forever change the company.
Working with the U.S. Army on a riflescope and the Navy on optics
for use aboard ships, the engineers at Leupold learned the secrets of
waterproofing and durable construction that would completely change
the world of sports optics.
Leupold & Stevens, Inc. is still family-owned, though the focus has turned
from land surveying to helping people across the globe survey their
environments with innovative, high-performance optics and accessories.
Leupold optics are renowned for their unchallenged ruggedness, absolute
waterproof integrity, and their vastly superior optical quality. More than
a century of observation and optical experience has gone into every
product we produce, and we think the results are well worth the extra effort
required to achieve this level of quality.
In true American style, the philosophical foundation laid in our early years
has served us well as we’ve grown and changed over the decades. In fact,
the firm’s founder established the clarity of purpose that we see at Leupold
& Stevens today:
“We solemnly promise never to let down on quality, the customer is entitled
to a square deal.” - Markus Friederich “Fred” Leupold

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ACCURACY
The ranging accuracy of the GX-2c rangefinder is +/- .5 yard/
meter. The maximum effective range depends upon a number
of factors including lighting conditions and air quality, but the
most important factor is the reflectivity of the target. For most
objects, the maximum distance is 500 yards, while for highly
reflective targets, distances of 700 yards can be obtained.
HOW IT WORKS
The Leupold GX rangefinders emit a series of invisible, infrared
energy pulses that reflect off the selected target back to the
optical unit. State-of-the-art circuitry and precision computing
circuits calculate the distance instantaneously by measuring the
time it takes for each pulse to travel from the GX rangefinder to
the object and back.
Surface texture, color, size, and shape of the target all affect
reflectivity, which in turn affects the maximum range of the
rangefinder. As a rule of thumb, brightly colored targets are
much more reflective than darker targets, with black being
the least reflective color. A shiny surface is more reflective
than a dull surface. Smaller targets are more difficult to range
than larger targets. Light conditions, haze, fog, rain, and other

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MAXIMUM RANGE
CONDITION GX-2c
Reflective Target (yd/m) 700/640
Trees (yd/m) 600/548
Pin (yd/m) 400/365
environmental conditions can all affect ranging performance.
Any factor which degrades air clarity will reduce the maximum
effective range. Bright light shining directly on the lenses
reduces the effectiveness, producing shorter maximum ranges
than those possible on darker (overcast) days. The steadier the
GX-2c unit is held, the greater the maximum distance.

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SAFETY AND OPERATION
PRECAUTIONS
The Leupold GX-2c 6x23mm rangefinder employs an eye safe
laser in its operation. Even so, there are a few precautions that
are important to remember.
• Do not depress the POWER button while aiming at a human
eye or while looking into the optics from the objective side.
• Do not leave the GX within the reach of small children.
• Do not take the product apart as it has a self-protection
device in the electronic control module and may cause an
electric shock.
• Do not attempt to use any power source other than a CR-2
battery (or equivalent) — the GX is designed to prohibit
accessing any other external power supply.
• Caution: Use of controls or
adjustments or performance of
procedures other than those
specified herein may result in
hazardous laser radiation exposure.
CLASS 3R LASER PRODUCT INVISIBLE LASER RADIATION
AVOID DIRECT EYE EXPOSURE This product complies with IEC
60825-1: 2014-05 Ed. 3.0 and complies with FDA performance standards
for laser products except for deviations pursuant to Laser Notice
No. 50, dated June 24, 2007.
Po:<5.14mW. λ:895-915nm. tW:10-20ns.
LEUPOLD & STEVENS, Inc,
14400 NW Greenbrier Parkway, Beaverton, OR 97006

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• When you see the display through the eyepiece, please be
aware that the product is active and emitting an invisible laser
and the laser aperture should not be pointed toward anyone.
The unit will produce an audible “click” when the power
button is activated to notify the user that the rangefinder is
emitting an invisible laser.
• Read this instruction manual in its entirety before using
this rangefinder. If the product is used in a manner not
specified by the manufacturer, the protection provided by the
equipment may be impaired.
(Display as seen through the eyepiece)
GX-2c Activated
Y
T
G
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SPECIFICATIONS
The GX-2c digital laser rangefinder provides a variety of useful
modes to tailor performance to the conditions you experience
on the course. Features are identified on the following pages.
GX-2c
Magnification 6x
Inclinometer Yes
TGR® (True Golf Range™) Yes
7 Selectable Aiming Reticles Yes
Quick Set Menu Yes
Line-of-Sight Distance Yes
Yards/Meters Yes
Fog Mode Yes
Flag Lock Yes
Prism Lock Yes
Scan Mode Ye s
Battery Life >6000 Actuations
Weight (with battery) 6.8 oz.
Dimension (Inches) 4" x 2.5" x 1.5"
Low Battery Indicator Yes
Warranty 2 Years
Waterproof Yes

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OPERATION
QUICK SET MENU™
*GX-2c display shown with all possible characters visible
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NOTE: To focus your GX rangefinder, turn the rubber eyepiece
left or right until crisp focus is achieved.
The GX-2c has two buttons: POWER and MODE. When you
initially press the POWER button, the display is activated and the
unit is ready for ranging. Press the POWER button a second time
to range, or press and hold the POWER button to scan. Scanning
automatically updates distance readings in the display. When
ranging long distances without a steady rest, you can easily
differentiate the pin from other potenial targets behind it.
GX-2c
1. Power
2. Mode
3. Focus
4. Battery
1
4
3
2

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The GX-2c rangefinder features PinHunter 3 Laser Technology,
which will provide you with the distance to the closest object
ranged. When you press and hold the MODE button for at least
2 seconds and then release it, the Quick Set Menu is prepared
for navigation. To activate a mode, you must advance to that
function by pressing and releasing the MODE button until the
desired function is displayed. To set a mode, press the POWER
button once and the icon for the mode will display and the word
“On” will appear in the bottom portion of the display. Pressing
the POWER button again will turn that mode off; displaying
the word “OFF” in the bottom portion of the display. Each
subsequent depression of the POWER button will toggle that
function between on and off.
NOTE: Allowing the rangefinder to sit idle for 30 seconds will
cause an automatic power-off, saving all selections. If additional
modes require activation/deactivation, simply press and release
MODE to continue through the Quick Set Menu. Pressing and
holding MODE for at least 2 seconds at any time will exit the
Quick Set Menu, save all previous changes, and prepare the
rangefinder for immediate use.
Hold POWER and MODE simultaneously for at least 10 seconds
to reset factory settings.

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FOG MODE
The Fog Mode is best used in foggy/rainy
conditions to screen out false readings from
raindrops or other atmospheric interference to
provide an accurate range. Fog Mode changes
the algorithm to look for the "last" object ranged.
When Fog Mode is on, the user will need to
range the base of the flag or lip of the green to increase ranging
accuracy. Turn Fog mode off when weather conditions are ideal.
TO ACTIVATE FOG MODE:
1) Press POWER to activate the rangefinder.
2) Press and hold MODE for at least 2 seconds to enter the Quick
Set Menu; release the MODE button, the word “Fog” will now
appear in the upper display.
3) While the word “Fog” is displayed, press and release POWER
as necessary until the word “On” is displayed in the lower
portion of the display.
4) To save the changes and return to ranging mode, let the unit
sit idle for at least 30 seconds until an automatic power-
down occurs, or simply press and hold MODE for at least
2 seconds. To continue through the Quick Set Menu and
manipulate another function, press and release MODE until
the appropriate icon is displayed.
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TRUE GOLF RANGE (TGR)
TGR is an adjusted range that will compensate
for uphill shots that play long, and downhill
shots that play short. TGR is calculated from
the line-of-sight distance, incline or decline,
and current temperature and altitude. TGR will
display the adjusted range the golfer should
play to. For example, if you have a lie 150 yards from the pin, but
the green falls 6 degrees above your ball, you should play the
shot as if it were 164 yards.
NOTE: Turning TGR off will also disable the Club Selector and
inclinometer display; all distance readings will be line-of-sight
(LOS) measurements.
Use of the GX-2c for tournament play is permitted when Local Rule
is in effect (see USGA Decision 14-3/0.5), and TGR is turned off.
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150 yards line of sight
164 True Golf Range to pin

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TO ACTIVATE TGR:
1) Press POWER to activate the rangefinder.
2) Press and hold MODE for at least 2
seconds to enter the Quick Set Menu;
press and release MODE one more time to
advance to TGR mode. The TGR icon will
now be displayed.
3) While the TGR icon is displayed, press and release POWER as
necessary until “On” is displayed in the lower portion of the
display. Press MODE to save.
4) To continue through the Quick Set Menu and manipulate
another function, press and release MODE until the
appropriate icon is displayed.
DAY OF PLAY TEMPERATURE/ALTITUDE INPUT
(dP)
Temperature and altitude are two of the factors
used to determine TGR ranges; inputting the
current temperature and altitude will increase
the accuracy of your TGR measurement. This
feature is intended for players who live in low
lying areas and travel to higher elevations to
play golf. It isn’t necessary to change these values if you
regularly play courses in the same geographical area.
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NOTE: If Yards is selected, the temperature will automatically be
measured in Fahrenheit. If Meters is selected, the temperature
will be measured in Celsius. Altitude is measured in feet for both
Yards and Meters.
TO INPUT THE CURRENT TEMPERATURE AND ALTITUDE: (dP)
1) Press POWER to activate the rangefinder.
2) Press and hold MODE for at least 2 seconds to enter the
Quick Set Menu.
3) Verify that TGR is turned on; if TGR is not activated, you will
not be able to enter the current temperature. To activate TGR,
see “To Activate TGR” (page 12).
4) Press and release MODE again; the last saved temperature will
be flashing in the lower portion of the display.
5) While the temperature is flashing, press and release POWER
to change the current temperature setting to match the
current conditions. Each depression of POWER will increase
the temperature setting by 5 degrees until 120 degrees F
has been reached, at which time the setting will return to 30
degrees F and begin increasing again. Press MODE to save
the changes.
6) Press and release MODE again and the last saved current
altitude will be flashing.

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7) While the altitude is flashing, press
and release POWER to change the
current altitude setting to match current
conditions; each depression of POWER
will increase the altitude setting by 500
feet until 9999 has been reached, at
which time the setting will return to 0
and begin increasing again.
8) To continue through the Quick Set Menu and manipulate
another function, press and release MODE until the
appropriate icon is displayed.
TGR SETUP (SU)
(Yards/Meters Output)
1) Press POWER to activate the rangefinder.
2) Press and hold MODE for at least 2 seconds
to enter the Quick Set Menu.
3) Press and release MODE until the word Unit
is shown in the upper display.
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4) While the word Unit is shown in the upper
display, press and release POWER as
necessary to toggle between yards and
meters, shown in the upper right portion of
the display.
5) To save the changes and return to ranging
mode, press and release MODE.
NOTE: If Yards is selected, the temperature will automatically be
measured by Fahrenheit. If Meters is selected, the temperature
will be in Celsius.
When TGR is activated, the Club Selector recommends the
proper iron for the current distance, shot angle, environmental
conditions, and multiple other factors.
Club Selector is automatically activated when TGR is turned on.
Press and release MODE to save your selection and move to the
next function.
Critical to accurate club recommendations is the
known striking distance of the user with specific
clubs. By inputting the actual distance obtained
with a few clubs, a specialized algorithm
accurately determines the distance obtained
with others. The actual distance obtained from
an 8-iron, 6-iron, and 4-iron shot should be input
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as accurately as possible. If no club distance
is input, the Club Selector will automatically
default to the preset distances (130 yards
for an 8-iron, 150 yards for a 6-iron, and 170
yards for a 4-iron). In addition to the striking
distances, the temperature and altitude at
which these distances were measured must
be input following the distance input process.
By entering the environmental conditions in which the specific
distances were obtained, the Club Selector will be able to adjust
the recommended iron according to the current conditions.
TO INPUT THE STRIKING DISTANCE OF THE 8, 6 AND 4-IRON:
NOTE: Though we strongly recommend inputting the specific
distances obtained with each of the irons mentioned above,
the specialized algorithms used by the GX-2c will make logical
assumptions about the remaining club(s) if specific distances are
not known for one or more of the remaining clubs. By inputting
your hitting distances, you will customize the rangefinder to your
game. Leaving the GX-2c in default mode will achieve typical
variances of +/- 1 club length.
Reminder: You cannot input a distance value less than or equal to
the previous club. For example, if you choose 155 yards for your
8-iron, the lowest available distance for your 6-iron will be 160 yards.
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Use MODE to navigate through the Quick Set Menu until TGR
(SU) is displayed;
1) The 8-iron symbol will be highlighted and the last saved
distance will be shown in the upper numeric display. If you
wish to input a distance other than the one shown, proceed
to step 2. To save the shown distance for your 8-iron, press
MODE and skip to step 3 below.
2) Press POWER to set the distance obtained with your 8-iron.
Each depression of POWER will increase the distance
associated with your 8-iron shot in 5-yard/meter increments
beginning with the last saved distance, until 200 yards (185
meters) is reached. Once 200 yards (185 meters) is reached, it
will reset to 60 yards (55 meters), and start over again. When
the appropriate distance is displayed, press MODE.
3) The 6-iron symbol will now be highlighted and the last saved
distance will be shown in the upper
numeric display. If you wish to input
a distance other than the one shown,
proceed to step 4. To save the shown
distance for your 6-iron, press MODE and
skip to step 5 below.
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