Leupold GX-1i3 User manual

GX
®
-1i
3
AND GX-2i
3
RANGEFINDERS
OPERATING INSTRUCTIONS

Introduction .................................................Page 1
About Leupold ...............................................Page 3
Accuracy ...................................................Page 5
How GX Rangefinders Work......................................Page 6
GX Rangefinder Specifications ...................................Page 9
Operation ..................................................Page 10
Using Prism Lock ...........................................Page 28
Trouble Shooting ............................................Page 29
Cleaning/Maintenance.........................................Page 30
Warranty/Repair .............................................Page 31
TABLE OF CONTENTS

1
Congratulations! You have purchased a Leupold®GX®Series digital laser
rangefinder that has been crafted by Leupold’s engineers and designers to
be the best rangefinder on the market, and to provide you with years of solid perfor-
mance on the course. Following are instructions detailing the proper use and employ-
ment of your GX Series rangefinder. To ensure top performance for the life of the prod-
uct, please read these instructions before operating your GX-1i3or GX-2i3rangefinder.
Your new Leupold GX Series digital laser rangefinder is a revolutionary, range-finding
device that incorporates advanced digital electronics with state-of-the-art trajectory
algorithms. The next generation Digitally eNhanced Accuracy (DNA®) engine
incorporates additional signal processing techniques to generate better ranging
distance with more accurate rangefinding. GX-2i3features include an inclinometer
and PinHunter 3 Laser Technology. Another truly innovative and unique feature is True
Golf RangeTM (TGR®), which is available on the GX-2i3TGR model. TGR is a marriage
of laser ranging, an inclinometer, and advanced trajectory calculations. The result is
INTRODUCTION

2
distance measurements based on your own hitting ability to get you as close to
the pin as possible. Don’t rely on the “average” from other units when you can
customize your GX-2i3.

3
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

4
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

5
The ranging accuracy of the GX-1i3and GX-2i3rangefinders 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 800 yards, while for highly reflective targets,
distances of 1100 yards can be obtained.
ACCURACY
MAXIMUM RANGE
CONDITION GX-1i3GX-2i3
Reflective Target (yd/m) 1100/1006 1100/1006
Trees (yd/m) 800/732 800/732
Pin (yd/m) 400/366 400/366

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The Leupold GX series of rangefinders emit a series of invisible, infrared energy pulses that
are reflected off the selected target back to the optical unit. State-of-the-art circuitry and
precision computing circuits are used to calculate the distance instantaneously by measur-
ing 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 instrument. 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 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 unit is held, the greater the maximum distance.
HOW IT WORKS

7
The Leupold GX-1i
3
and GX-2i
3
6x23mm rangefinders employ an eye safe laser in their
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
SAFETY AND OPERATION
PRECAUTIONS
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

8
SAFETY AND OPERATION PRECAUTIONS (CONT.)
• Caution: Use of controls or adjustments or performance of procedures other than those
specified herein may result in hazardous laser radiation exposure
• 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-2i
3
Activated GX-1i
3
Activated

9
SPECIFICATIONS
The GX Series of digital laser rangefinders provides a variety of useful modes to tailor
performance to the conditions you experience in the field. Model features are identified
on the following pages.
GX-1i3GX-2i3
Magnification
6x 6x
Inclinometer
No Yes
TGR®(True Golf Range
™
)
No Yes
7 Selectable Aiming Reticles
Yes Yes
Quick Set Menu
Yes Yes
Line of Sight Distance
Yes Yes
Yards/Meters
Yes Yes
Fog Mode
Yes Yes
Prism Lock
Yes Yes
Scan Mode
Yes Yes
Battery Life >7000 Actuations >7000 Actuations
Weight (with battery)
6.2 oz. 6.2 oz.
Dimension (Inches) 4" x 2.75" x 1.5" 4" x 2.75" x 1.5"
Low Battery Indicator
Yes Yes
Warranty
2 Years 2 Years
Waterproof
Yes Yes

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OPERATION
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QUICK SET MENU™
*GX-2i3display shown with all possible characters visible

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GX-1i
3
& GX-2i
3
BATTERY
POWER
MODE
FOCUS
NOTE: To focus your GX rangefinder, turn the rubber eyepiece left or right until crisp
focus is achieved.
The GX-1i3 and GX-2i3have two buttons: POWER and MODE. When you initially push
the POWER button, the display is activated and the unit is ready for ranging. Press the
POWER button a second time to range, or hold the POWER button depressed to scan.
Scanning automatically updates the display. When ranging without a steady rest at long
distances, you can easily differentiate the pin from other potenial targets in the distance
behind the pin.

12
The GX-1i3and GX-2i3series rangefinders feature PinHunter 3 Laser Technology,
which will always provide you the distance measurement to the closest object ranged.
When you press and hold the MODE button for at least 2 seconds then release
it, the Quick Set MenuTM is prepared for navigation. To set or activate a mode, you
must advance to that function by pressing and releasing the MODE button until that
function is displayed. To activate a mode, press the POWER button, the icon will
display steadily 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.

13
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 provides the distance to the last object
ranged. With Fog mode on, the user will need to range
the base of the flag or lip of the green. Turn Fog mode
off when ideal conditions exist.
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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 continue through the Quick Set Menu and manipulate another function,
press and release MODE until the appropriate icon is displayed.

14
TRUE GOLF RANGE (TGR) (GX-2i3ONLY)
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 will play the shot as if it were 164 yards.
in
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150 yards line of sight
164 True Golf Range to pin

15
NOTE: Turning TGR off will also disable the Club Selector and inclinometer display; all
distance readings will be line-of-sight (LOS) measurements.
TO ACTIVATE TGR: (GX-2i3ONLY)
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
feature, press and release MODE until the appropriate icon is displayed.
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DAY OF PLAY TEMPERATURE/ALTITUDE INPUT (dP) (GX-2i3ONLY)
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 regularly playing courses in the same geographical area.
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.
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17
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 15).
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.