Bushnell 137570 Manual de usuario

Instruction Manual

MODEL: 137570

Binoculars

with

Digital

Compass

LIT. #: 981192/0812

Compass

Power Switch

Battery

Cover

Tripod Attachment

Socket Cover

Left Eyepiece

Focus

Right Eyepiece

Focus

Parts

Reference

BUSHNELL MARINE porro prism binoculars are designed for the boating enthusiast in particular, but are also

ideal for any demanding environment or application where rock-solid durability is required. Your Marine model

# 137570 features a digital compass built into the viewing optics, with direction and bearing indicators tracking

as you view. Bearings are called out in easy-to-read precise 1° increments, ideal for navigation and locating

objects accurately. The digital compass delivers reliable accuracy anywhere in the world (both Northern and

Southern hemispheres). A range-nding scale allows the viewer to estimate the range to objects of a known

size. A tilt sensor and display help ensure the binocular is held at a level angle for accurate operation. The

BUSHNELL MARINE is fully waterproof/fogproof and shock protected with suregrip rubber armoring, and

has roll-down eyecups for use with sunglasses and prescription eyeglasses. The optics feature multi-coated

lenses for excellent light transmission, along with a UV reducing lens coating and internal UV lter to prevent

potentially harmful ultraviolet light (wavelengths below 400nm) from reaching your eyes. The BUSHNELL

MARINE comes complete with rugged nylon case and neck strap. Built to last, with a lifetime limited warranty.

ADJUSTING THE BINOCULARS

First, adjust the width (interpupillary distance) of your binoculars with the central hinge, so that when you

look through them, you see a single circular image. Then focus the binocular for one eye at a time by turning

the oculars (eyepieces) until you see an equally sharp image with each eye. If more than one person will

be using the binoculars, you should mark the left and right eyepieces for your own vision to permit quick

readjustment.

ABOUT THE DIGITAL COMPASS

The built-in compass is a precision unit with a digital display which indicates

bearing in degrees, corresponding to the direction the binoculars are aimed, as

well as the compass point heading. When using the compass, always keep in

mind the local variation between magnetic and true north. To turn on the compass

display, press the rectangular button on the top left side of the binocular.

ABOUT THE DIGITAL COMPASS

Power automatically turns off after one minute to prolong battery life. If the display does not come on,

replace the batteries (see “How to Change the Batteries”).

Before using the compass for the rst time, it is necessary to calibrate the compass, using the

following procedure:

COMPASS CALIBRATION PROCEDURE

This calibration procedure will ensure that the displayed readings are accurate for the area in which the

compass will be used. The calibration should be done outdoors if possible, and with the binocular kept at

least 7 feet away from any large metal objects. Facing due north is not required for calibration.

For best results, the compass should be calibrated again:

1) After any signicant change in your location since the last calibration

2) After changing the battery, especially if a different brand is used

3) If the binocular was in direct contact with a large metal object (for example a steel table) while the

power was on (note that the power automatically shuts off after one minute, so this should not be

common)

TO CALIBRATE THE COMPASS: After turning on the compass by pressing the power button on the top

right side of the binocular, rotate the entire binocular clockwise or counter-clockwise once in a full circle

(360 degrees) along each of these three axes, in this order, returning to the starting position at the end of

each step (see the diagrams on the following page):

Step 1: Pitch (rotate 1 full cycle “end over end”, in a vertical plane up/down)

Step 2: Yaw (rotate 1 full cycle “spinning around”, in a horizontal plane left/right)

Step 3: Roll (rotate 1 full cycle as shown along the binocular’s center hinge axis)

READING THE COMPASS

After completing the last rotational cycle, the compass is calibrated, and will display “0” degrees when the

binocular is pointing straight North (magnetic north), 180 degrees when pointed due South, etc. The chart

below shows the range of degrees corresponding to each of the 8 segments in the circle to the left of the digital

display, which represent common compass headings. For example, when the compass indicates anywhere

from 338 to 22 degrees, the North segment will “switch off” (become clear) indicating that the binocular is

pointed in a northerly direction.

Step 1-Pitch

(rotate 1 full cycle “end over end”,

in a vertical plane up/down)

Step 2: Yaw

(rotate 1 full cycle “spinning around”,

in a horizontal plane left/right)

Step 3: Roll

(rotate 1 full cycle as shown along

the binocular’s center hinge axis)

CALIBRATING

THE COMPASS

Direction Deg. Range Direction Deg. Range

N (360/0°) 338°~22° S (180°) 158°~202°

NE (45°) 23°~67° SW (225°) 203°~247°

E (90°) 68°~112° W (270°) 248°~292°

SE (135°) 113°~157° NW (315°) 293°~337° Display example

(Due South)

1) To measure distance when the height is known:

Object height (m)

Scale Reading (mils)

2) To measure object height when the distance is known:

Distance (m) x Scale Reading (mils)

1000

HOW TO USE THE RETICLE

The vertical scale (reticle) visible through the left half of the binocular, above the compass display, allows you

to calculate distance to an object if you know its height, or to calculate the height of an object if you know its

distance from you. Each mark on the vertical scale has a value of 5 MIL (1 Mil is equivalent to an angle that

can determine an object one meter in height at a distance of 1000 meters).Therefore, if a navigation chart

gives the height of an object, by sighting on it and counting the number of MILs, you can determine how far

away it is. Here are the two formulas (note the use of metric units):

x 1000 m = Distance in meters

= Object height in meters

Ranging

Reticle

Example:

You know the height of a lighthouse is 85 ft / 26 m. The top of

the lighthouse comes up to the 60 mil mark on the reticle. So,

26/60=0.43. Multiplying that by 1000 gives you a distance of

433.3 meters (about 1/4 mile) from the lighthouse.

HOW TO CHANGE THE BATTERIES

To change the battery, use a coin to remove the battery compartment cover by turning it counter-clockwise,

until the “unlocked” icon and white dot on the cover line up with the dot on the binocular. Set the cover aside

and remove the battery. Note the “+” and “-“ polarity markings on the battery. Be sure to insert the new battery

correctly, in the same direction as shown on the sticker inside the battery compartment, with the “+” (positive)

terminal going in rst so it is at the bottom of the compartment, and the “-“ negative end facing the battery

cover. Replace the battery cover with the “unlocked” icon and two dots lined up again, then turn it (with ngers

or a coin) until the “locked” icon lines up with the dot on the binocular. The battery should be taken out if the

binoculars will not be used for a long time. Batteries left in the binocular for prolonged periods of time without

being used may leak and cause damage to the binocular. After replacing the battery, be sure to follow the

calibration procedure for the digital compass.

Battery Requirement: One CR2 Lithium (3 volt)

Cover

Unlocked

Cover

Locked

Polarity

Sticker

ABOUT THE TILT INDICATOR

The left side of the digital window at the bottom of the display indicates the binocular’s vertical tilt in degrees.

When you are holding the binocular level, the indicated tilt angle will be “ 0o ”. Keeping the binocular within no

more than 5 degrees (+ or -) of zero on the tilt indicator will help to ensure more accurate results when using

the compass or ranging reticle.

IMPORTANT NOTE

After exposure to saltwater or spray, ush the binoculars thoroughly with fresh water

and wipe dry. Avoid extended exposure to bright sunlight and severe temperature

uctuations. For example, if the binocular has been used under very cold conditions,

bringing it into a heated environment could cause condensation build up. Allow time

for gradual change in temperature.

Technical Specications

Binocular Specications

Magnication 7x

Objective Lens 50 mm

Eye Relief 17.5 mm

Real Field ofView 7.0 °

Field ofView @1000 yds 367 ft.

Exit Pupil 7.1 mm

Compass Specications

Azimuth Accuracy -3~+3 degrees

Azimuth Range 0~359 degrees

Azimuth Resolution 1 degree

Operating Temp -10~+55°C

Current Consumption 12 mA

Voltage Required 2.7~3.4 volts

Tilt Sensor Specications

Measurable Range +/- 60 deg. (front)

Tilt Resolution 1 deg.

Accuracy +/- 5 deg.

Data Update Every 0.1 sec.

Looking for optical equipment & accessories? Visit our website.

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