Leupold GX-4I2, GX-3I2 User Manual
®
GX -3i
2
and GX -4i
Rangefinders
OPERATING INSTRUCTIONS
®
2
Table of Contents
Introduction .................................................. Page 1
About Leupold & Stevens, Inc. ................................... Page 3
Accuracy ..................................................... Page 5
How GX Rangefinders Work..................................... Page 6
GX Rangefinder Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 9
Operation ................................................... Page 10
Cleaning/Maintenance......................................... Page 34
Warranty/Repair .............................................. Page 35
1
Introduction
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-3i2 or GX-4i2.
Your new Leupold GX Series digital laser rangefinder is a revolutionary,
range-finding device that incorporates advanced digital electronics with
state-of-the-art ballistics algorithms. The next generation Digitally eNhanced
AccuracyTM (DNA®) engine incorporates additional signal processing
techniques to generate better ranging distance with more accurate
rangefinding. GX-4i2 features include an incredibly bright OLED display,
inclinometer, and PinHunter2 Laser Technology. Another truly innovative and
unique feature is True Golf RangeTM (TGR®), which is available on the GX-4i2
TGR model. TGR algorithms are a marriage of laser ranging, an inclinometer,
and an advanced computerized ballistics program. The result is distance
measurements accurate to less than a yard, no matter the angle at which the
laser is fired.
2
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. But 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, and their vastly superior optical
quality. 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, Inc.
today:
“We solemnly promise never to let down on quality, the customer is entitled to
a square deal.”
Markus Friederich “Fred” Leupold
4
5
Accuracy
The ranging accuracy of the GX2 series of rangefinders 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 550 yards, while for highly
reflective targets (such as pin prisms), distances of 700 yards can be obtained.
MAXIMUM RANGE
2
CONDITION
Reflective Target (yd/m)
Trees (yd/m) 550/502 550/502
Pin/Flag (yd/m) 450/411 450/411
GX-3i
700/640 700/640
GX-4i
2
How it Works
The Leupold GX2 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 GX2 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 GX2 unit is held, the greater the
maximum distance.
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7
CLASS 3R LASER PRODUCT INVISIBLE LASER RADIATION
AVOID DIRECT EXPOSURE
This product complies with IEC 60825-1
2007-03 Ed 2.0 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 :895nm-915nm. T:20ns.
LEUPOLD & STEVENS, Inc,
14400 NW Greenbrier Parkway, Beaverton, OR 97006
Safety and Operation Precautions
The Leupold GX2 6x22mm rangefinders employ an eye safe FDA Class 1 laser
in their operation. Outside of the United States, the IEC is the governing body
over laser products and has classified the GX2 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
• 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 CR2 battery
(or equivalent) — the GX2 is designed to prohibit accessing any other
external power supply
2
within the reach of small children
Safety and Operation Precautions (cont.)
• 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
• Caution: Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous 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
2
GX-4i
Display
(Smart Key on)
(Display as seen through the eyepiece)
GX-4i2 Display
(Smart Key off)
8
GX-3i2 Display
9
Specifications
The GX2 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.
Magnification
Inclinometer
TGR® (True Golf Range™)
Club Selector
3 Selectable Aiming Reticles
Quick S et Menu
Line of Sight Distance
Yards/Meters
Fog Mode
Prism Lock
1-Touch Scan Mode
Battery Life
Weight
Dimension (Inches)
Low Bat tery Indic ator
Warranty
Weatherproof
2
GX-3i
6x 6x
No Yes
No Yes
No Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
>4000 Actuations >4000 Actuations
7.8 oz 7.9 o z
3.8L x 3.0 H x 1.4W 4.2L x 3.0 H x 1.4W
Yes Yes
2 Yea rs 2 Yea rs
Yes Yes
GX-4i
2
Operation
QUICK SET MENU
*GX-4i2 display shown with all possible characters visible
10
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