Leupold GX-5i User manual

OPERATING INSTRUCTIONS
GX
®
-5i
3
RANGEFINDER

Introduction..........................................................................................Page 1
About Leupold & Stevens, Inc. ..............................................................Page 2
Accuracy ..............................................................................................Page 4
How GX Rangefinders Work....................................................................Page 5
GX Rangefinder Specifications ...............................................................Page 8
Operation .............................................................................................Page 9
Cleaning/Maintenance ...........................................................................Page 33
Warranty/Repair.....................................................................................Page 34
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-5i3features include an
incredibly bright OLED display, inclinometer, and PinHunter 3 Laser Technology.
Another truly innovative and unique feature is True Golf RangeTM (TGR®). 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.
INTRODUCTION

2
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.

3
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
The ranging accuracy of the GX-5i3series 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-5i3
Reflective Target (yd/m) 700/640
Trees (yd/m) 550/502
Pin/Flag (yd/m) 450/411

5
The Leupold GX-5i3rangefinder 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

6
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. t
W
:10-20ns.
LEUPOLD & STEVENS, Inc,
14400 NW Greenbrier Parkway, Beaverton, OR 97006

7
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)

8
SPECIFICATIONS
The GX-5i3digital 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-5i3
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
2 Years
Weatherproof
Yes

9
OPERATION
QUICK SET MENU™
*GX-5i3display shown with all possible characters visible

10
GX-5 i3
BATTERY
POWER
MODE
FOCUS
The GX-5i3has 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 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 potential
targets behind the pin.

11
When you press and hold the MODE button for 2 seconds and then release it, the
Quick Set Menu is activated. To set or activate a mode, you must advance to that
function by pressing the MODE button until that function is displayed. To activate
or manipulate a function, press the POWER button as necessary. If this is the last
function to be set, allowing the rangefinder to sit idle for 30 seconds will cause an
automatic power-off, saving all selections. If additional set up is required, simply
press 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. To reset your GX-5i3to factory settings, press POWER to activate the unit.
With the rangefinder activated, press and hold MODE, then immediately press
and hold POWER while continuing to hold MODE depressed. After the 10-second
timer shown in the display reaches zero, the rangefinder will return to factory set-
tings.

12
FOG MODE
The Fog Mode can be 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”
target. To increase ranging accuracy always range the
ground around the pin/flag when Fog Mode is on.
TO ACTIVATE FOG MODE:
1) Press POWER to activate the rangefinder.
2) Press and hold MODE for at least 2 seconds and then release to enter
the Quick Set Menu; 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.

13
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 feature, press
and release MODE until the appropriate icon is displayed.
NOTE: There is no icon for Fog Mode in normal operation. When powered on the unit
will display Fog On/OFF status to remind you of the current setting. We recommend
turning Fog Mode off during normal ranging to enable easy location of the pin/flag.
TGR TECHNOLOGY:
Use of the GX-5i3for tournament play is permitted when Local Rule is in effect (see
USGA Decision 14-3/0.5), and TGR is turned off.

14
TRUE GOLF RANGE (TGR)
True Golf Range is an adjusted range that will compen-
sate for uphill shots that play long and downhill shots
that play short. TGR is calculated from the line of sight
distance, incline or decline, current temperature and
altitude, and 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.

15
NOTE: Turning TGR off will also disable the Club Selector
and inclinometer display; all distance readings will be
line-of-sight measurements.
TO ACTIVATE TGR:
1) Press POWER to activate the rangefinder.
2) Press and hold MODE for at least 1 second and
then release to enter the Quick Set Menu; press and release MODE
one more time to advance to TGR mode.
3) While TGR is shown in the upper portion of the display, press and
release POWER as necessary until “On” is shown 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 feature, press
and release MODE until the appropriate mode is displayed.

16
DAY OF PLAY TEMPERATURE INPUT (dP)
Temperature is one of the factors used to determine TGR ranges;
inputting the current temperature will increase the accuracy of your
TGR measurement. The default temperature setting is 75 degrees F
(25 degrees C).
NOTE: If yards is selected as the desired measurement output,
the temperature will automatically be measured in Fahrenheit. If
meters is selected, the temperature will be measured in Celsius.

17
MANUALLY INPUT THE DAY OF PLAY TEMPERATURE:
1) Press POWER to activate the rangefinder.
2) Press and hold MODE for at least 1 second and release 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, see “To Activate TGR:” above.
4) Press and release MODE until temperature is displayed.
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 (50 degrees C) has been reached, at
which time the setting will return to 30 degrees F (0 degrees C) and
begin increasing again.
6) 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 feature, press and release
MODE until the appropriate icon is displayed.