©2013 BARSKA® | Pomona, CA 91767, USA | www.barska.com
BC375
11/13
Eyepiece/Focuser
Objective Lens
Attached Handle
INTERNAL RANGEFINDER
AND DIRECTIONAL COMPASS RETICLE
CAUTION: DO NOT LOOK DIRECTLY AT THE
SUN VIEWING THE SUN OR ANY LIGHT
SOURCE WITH THIS OPTICAL DEVICE CAN
CAUSE PERMANENT EYE DAMAGE.
INSTRUCTIONS FOR USE
1. Remove eyepiece / focuser
cover and objective lens cover.
2. Hold monocular up to eye with one
hand using attached handle.
With the other hand, focus on an
object in the distance by
rotating focuser.
HOW TO CARE FOR YOUR MONOCULAR
1. When wiping the eyepiece or objective
lens, use the included lens cloth or a soft
lint-free cloth.
2. To remove any remaining dirt or
smudges, add 1 or 2 drops of alcohol to
the cloth and gently wipe objective lens
and eyepiece.
3. Store monocular in a moisture-free area.
IMPORTANT: Never attempt to clean your monocular internally or attempt to take it apart.
USING THE INTERNAL RANGEFINDER
To use the rangefinder scale, you will need to know either (1) the height or (2) the distance of the
object. When the height of the object is known, the rangefinder scale can provide the distance to
the object. When the distance of the object is known, the rangefinder scale can provide the height
of the object. Each mark on the vertical scale has a value of 5MIL (1 MIL is equivalent to an angle
that can determine an object one meter in height at a distance of 1000 meters.); therefore, by
counting the number of MILs, you can determine how far away or how big an object is. Align the
horizontal scale with the base of the object measured, and use equation below to find the
DISTANCE or SIZE of the object.
To measure the DISTANCE (object height must be determined):
1000 x Object Height
Rangefinder Scale Reading
Distance =
To measure the size (object distance must be determined):
Distance x Rangefinder Scale Reading
1000
Size =
To Measure the Distance
To Measure the Size
USING THE DIRECTIONAL COMPASS RETICLE
The compass scale is in one degree increments. It is aligned with the vertical range
finding scale. North is represented as 0˚, East as 90˚, South as 180˚ and West as 270˚.
When using the compass, bear in mind the local variation between magnetic North and
true North. NOTE: Compass does not operate in southern hemisphere. Compass
accuracy is limited and should not be used for navigation.
Deep Sea 7x42 Monocular
