Leupold GX 1i User manual

OPERATING INSTRUCTIONS
GX 1iand 2i Series
Rangefinders
®
Part # 117332
Artwork # 117335

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 14
Trouble Shooting ............................................. Page 41
Cleaning/Maintenance......................................... Page 43
Warranty/Repair .............................................. Page 44
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
performance on the course. Following are instructions detailing the proper use
and employment of your GX Series rangefinder. To ensure top performance for
the life of the product, please read these instructions before operating your
GX-1i or GX-2i rangefinder.
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-2i features
include an inclinometer, and PinHunter Laser Technology. Another truly
innovative and unique feature is True Golf RangeTM (TGR®), which is available
on the GX-2i TGR model. TGR is a marriage of laser ranging, an inclinometer,
Introduction

2
and advanced trajectory calculations. The result is distance measurements
accurate to less than a yard, no matter the angle at which the laser is fired.

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 engi-
neers 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 qual-
ity.

4
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

5
The ranging accuracy of the GX-1i and GX-2i rangefinders is +/- .5 yard/meter.
The maximum effective range depends upon a number of factors including light-
ing conditions and air quality, but the most important factor is the reflectivity of
the target. For most objects, the maximum distance is 600 yards, while for highly
reflective targets, distances of 800 yards can be obtained.
Accuracy
MAXIMUM RANGE
CONDITION GX-1i GX-2i
Reflective Target (yd/m) 800/732 800/732
Trees (yd/m) 600/550 600/550
Pin (yd/m) 400/365 400/365

6
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 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 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 reduc-
es 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 and GX-2i 6x23mm rangefinders employ an eye safe FDA
Class 1 laser in their operation. Outside of the United States, the IEC is the gov-
erning body over laser products and has classified the GX rangefinders as Class
3R. 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

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 Activated GX-1i Activated

9
Specification
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-1i GX-2i
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 >6000 Actuations >6000 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
1 Year 1 Year
Waterproof
Yes Yes

10
Operation
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3
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5
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7
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9
P
C
L
U
B
QUICK SET MENU™
*GX-2i display shown with all possible characters visible

11
GX-1i& GX-2i
Battery
POWER
MODE
Focus
The GX-1i and GX-2i have two buttons: POWER and MODE. When you initially
s

12
from other potential targets in the distance behind the pin. The GX-1i and
GX-2i series rangefinders feature PinHunter Laser Technology, which will always
provide you the distance measurement to the closet object ranged. When you
press and hold the MODE button for 1 second 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 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 but-
ton will toggle that function between on and off. If this is the last mode to be
set, allowing the rangefinder to sit idle for 20 seconds will cause an automatic
power-off, saving all selections. If additional modes require activation/deactiva-
tion, simply press MODE to continue through the Quick Set Menu.

13

14
Many courses have highly reflective prisms
included in key course features. These prisms
provide your GX rangefinder with an extremely
intense return signal, allowing it to lock onto
the prism quickly and provide instant feedback
that you have accurately ranged the intended
target. When using scan mode to range a course
feature with integral prisms, your GX range-
finder will produce an audible beep and the
lock icon will be shown in the lower left portion of the display. Prism Lock
is always activated and will automatically detect the presence of prisms
in course features when scanning at a distance of 25 yards or greater.
NOTE: Prism lock is only active when in scan mode.
2
3
4
5
6
7
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9
P
C
L
U
B
Using Prism Lock

15
Note: The audible beep can be turned on/off utilizing the Quick Set Menu.
Simply toggle through the functions using the mode button until “bEEP” is
shown in the display. Press POWER to select on or off.
FUNCTION 1: FOG MODE
The Fog Mode can be used in foggy/rainy conditions to screen out false read-
ings from raindrops or other atmospheric interference to provide an accurate
range.
When entering the Quick Set Menu, Fog Mode is
the first mode encountered. The word “Fog” will
appear in the upper display and the lower display
will show whether it is on or off. Press POWER to
toggle Fog Mode on and off. Press MODE to save
your selection and move on to the next function.
23
4
5
6
7
8
9
P

16
How do I activate Fog Mode?
1) Press POWER to activate the rangefinder.
2) Press and hold MODE for at least 1 second 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 20 seconds until an automatic power-down occurs, or simply press and
hold MODE for at least 1 second. To continue through the Quick Set Menu and
manipulate another function, press and release MODE until the appropriate icon
is displayed.

17
FUNCTION 2: TRUE GOLF RANGE (TGR) (GX-2iONLY)
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.
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P
150 yards line of sight
164 True Golf Range to pin