6. Using the “diopter setting” adjustment ring, focus
the same object being viewed. Caution should be
used as over turning or forcing the diopter eyepiece
can damage or cause the eyepiece to break away
from the chassis.
7. Your binocular should be adjusted for your eyes
Focus at both far and near distance can now be
attained simply by turning the center focus wheel.
Waterproof / Fog-Proof
Your binocular may be designed and built utilizing the latest
waterproof and fog-proof technology. This binocular is
O-ring sealed for complete protection. Fog proof protection
is achieved from dry nitrogen purging to remove all internal
moisture.
Instructions For Care
If handled with care, this binocular will provide years of
trouble-free service. Like any fine optical instrument your
binocular should be given sensible care. Non waterproof
models should not be exposed to excessive moisture.
1. Keep the lens covers (that come with your binocular,
except compact models) on the lenses when
binoculars are not in use.
2. Avoid banging and dropping.
3. Store in a cool, dry place.
4. Looking directly at the sun with your binocular may
be very harmful to you eyes.
This binocular is a precision instrument designed to provide
many years of pleasurable viewing. This booklet will help
you achieve optimum performance by explaining how you
can adjust the binocular to your eyes, and how to care for
this instrument. Read the instructions carefully before using
your binoculars.
Eye Adjustments
Fig.1 INTERPUPILLARY DISTANCE ADJUSTMENT
HOW TO ADJUST FOR DISTANCE BETWEEN YOUR
EYES
The distance between the eyes, called “interpupillary
distance” (IPD), varies from person to person. To achieve
perfect alignment of lens to eye, follow these simples steps.
1. Hold your binocular in the normal viewing position.
2. Grasp each barrel firmly. Move the barrels closer
together or further apart until you see a single
circular field. Always re-set your binocular to this
position before using.
HOW TO ADJUST FOR INDIVIDUAL EYE STRENGTH
Human eyes are as individual as fingerprints. This
binocular has a feature which allows you to adjust the
binocular to your vision. Follow the focusing instructions for
your binocular style.
Focusing
CENTER FOCUS-has a central focusing wheel between
the barrels.
1. Adjust interpupillary distance (Figure 1)
2. Keep both eyes “open” at all times.
3. Using a lens cover or your hand, cover the objective
(front) lens of the side with the “diopter setting”
4. Using the center focus wheel, focus the distant
object being viewed.
5. Cover the other objective lens, then view the same
object as explained above.
10x30mm Binocular Manual
5/20
BC641
©2020 BARSKA® Pomona, CA 91767, USA
www.barska.com
Parts Of The Binocular
A. Right Eye Diopter
B. Eyepiece
C. Center Focus
Read all instructions before use
DO NOT use this optical product to view the Sun
or any light source. CAUTION: Viewing the Sun
can cause permanent eye damage.
See reverse side for more information
D. Objective Lens
E. Tripod Adaptable Fitting
A
B
D
C
E
