2. Cover right objective (front) lens with your
hand. Rotate left eyepiece until image is
focused.
3. Follow the same procedure for the right eye.
The eyepiece should be turned in a counter-
clockwise direction for more distant objects.
With the image now in focus, make a note of
the diopter setting for future use.
FOCUS-FREE
(select models)
Focus-free binoculars offer “never needs focusing”
optical systems.
“ZOOM” FEATURE
(select models)
1. Follow the steps for focusing as outlined under
“Center Focus”
2. When focusing a “zoom” binocular, it is best to
begin at the highest power. This will provide a
more comfortable focus at the lower powers.
Set the “zoom” lever at high power.
3. Adjust your binocular for individual eye
strength using the “diopter setting”
Your binocular is now adjusted properly for your
eyes. You may now “zoom” “out” or “in” on any
distant object.
Note: to focus on an object at a closer distance,
focus on the object at high power first and then adjust
the “zoom” lever to the desired lower power. With any
“zoom” instrument, better quality images are possible
at lower powers.
CENTER FOCUS-has a central focusing wheel
between the barrels.
INDIVIDUAL FOCUS-each eyepiece is focused
separately. Most typically with waterproof/fog-proof
models.
FOCUS FREE-binocular require no focusing
adjustment.
CENTER FOCUS
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.
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.
INDIVIDUAL FOCUS
(select models)
1. Adjust interpupillary distance. Make a note of
the number which appears on the central
hinge scale. Always re-set your binocular to
this position before using. (To see a single
circular field.)
INSTRUCTIONS FOR USE
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.
I. EYE ADJUSTMENTS (FIGURE 1)
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.
II. FOCUSING
Binoculars have three primary focusing systems,
center, individual and focus-free. “Zoom” binoculars
utilize the center focus system.
Fig.1 INTERPUPILLARY DISTANCE ADJUSTMENT
Center
Focus
Wheel
Diopter Setting
Fig.2 DIOPTER SETTINGS
Center Focus
Wheel
CAUTION: DIRECTLY VIEWING THE SUN OR ANY LIGHT SOURCE
WITH THIS OPTICAL DEVICE CAN CAUSE PERMANENT EYE DAMAGE.
Zoom Lever
Fig.2 “ZOOM” SETTINGS
