OPERATING INSTRUCTIONS
GX®-5i
3
RANGEFINDERS
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
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-5i3.
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-5i3 features include an
incredibly bright OLED display, inclinometer, and PinHunter 3 Laser Technology.
Another truly innovative and unique feature is True Golf RangeTM (TGR®), which
is available on the GX-5i3 TGR model. TGR algorithms are a marriage of laser
ranging, an inclinometer, and an advanced computerized ballistics program. The
Introduction
2
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. 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.
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, Inc. 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-5i3 series of rangefinder is +/- .5 yard/meter. The max-
imum 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.
Accuracy
MAXIMUM RANGE
CONDITION
GX-5i
3
Reflective Target (yd/m)
700/640
Trees (yd/m) 550/502
Pin/Flag (yd/m) 450/411
6
The Leupold GX-5i3 rangefinder emits 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 tar-
gets 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 envi-
ronmental 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-5i3 6x22mm rangefinder employs 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 CR2 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.
P
o
:<5.14mW. λ:895-915nm. tW:10-20ns.
LEUPOLD & STEVENS, Inc,
14400 NW Greenbrier Parkway, Beaverton, OR 97006
8
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
(Display as seen through the eyepiece)
GX-5i3 Display
(TGR on)
GX-5i3 Display
(TGR off)
9
Specifications
The GX-5i3 digital laser rangefinder 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-5i
3
Magnification
6x
Inclinometer (Selectable for USGA rule 14-3)
Yes
TGR® (True Golf Range™) (Selectable for USGA rule 14-3)
Yes
Club Selector (Selectable for USGA rule 14-3)
Yes
3 Selectable Aiming Reticles
Yes
Quick Set Menu
Yes
Line of Sight Distance
Yes
Yards/Meters
Yes
Fog Mode
Yes
Prism Lock
Yes
1-Touch Scan Mode
Yes
Battery Life
>4000 Actuations
Weight
7. 8 o z
Dimension (Inches)
3.8L x 3.0H x 1.4W
Low Battery Indicator
Yes
Warranty
5 Year s
Weatherproof
Yes
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