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ATHLONOPTICS.COM
ATHLONOPTICS.COM
STEP 3 - HOW TO
ADJUST FOR INDIVIDUAL EYE STRENGTH
Most individuals have a slight difference in
eyesight in their right and left eyes. Your Ath-
lon binocular has a diopter adjustment which
allows you to fine-tune the binocular for the
different vision in your eyes. Follow the focus
-
ing instructions below.
•
The control for the diopter adjustment is a
ring located on the right side, directly below
the eyecup. See
Figure 3
.
•
Set the diopter adjustment to “zero” to start.
To do this make sure the index dot on the
diopter adjustment ring is lined up with the
“0”mark on right side of the binocular.
•
Keep both eyes open at all times. Using the
lens cap or your hand, cover the front lens of
the right side of the binocular.
•
Focus on a distant object, at least 20 yards
away that has fine detail such as a tree , a
bush or even a brick wall. By using the cen-
STEP 2 - INTERPUPILLARY
DISTANCE (IPD) ADJUSTMENTS
How to adjust for distance between your eyes.
The distance between the center of your pupils
of your left and right eyes is called “Interpupil-
lary distance” (IPD). The IPD is different for
each person. To achieve perfect alignment of
lens to your eyes, you must match the IPD of
your binoculars to that of your eyes so that you
see a single image free from shading edge to
edge. Follow these simple steps:
•
Hold the binocular to your eyes as if you
were going to use them to look at something
in the distance.
•
Move the binocular barrels closer together
or further apart until they line up with your
eyes and you see a single full circle. Make
sure to reset this adjustment every time you
use your binoculars. See
Figure 2
.
Figure 2
Figure 3
