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4.1.3 Adjusting for image quality and clarity.
Unlike some binoculars that have a center
focus to make adjustments this binocular has
individual focusing adjustments. In order for you
to adjust the optics to your individual eyes, you
will need to adjust each eyepiece or ocular. After
placing the binocular at your eyes, you will need
to close your left eye. With your right eye open,
you will need to take the f ingers in your right
hand and adjust the ocular until you see a per-
fectly clear image of the target you are looking
at. Lower the binocular and remember the diopter
setting for the right eye . Now closing your right
eye, repeat the process you used for the right eye
and tur n the left diopter until you have a per-
fectly clear image. Again, take note of the diopter
setting for the left eye. If, for some reason, the
diopter settings are moved, such as letting some
other person use the binocular, you will be able to
quickly use (with out adjustments) the binocular
again by setting the right and left oculars to their
correct diopter settings for your eyes.
4.2 How to use the reticle measure azimuth
4.2.1 What is azimuth
The
following is the basic def inition of Azi-
muth. Azimuth of a body is the arc of the hori-
zon intercepted between the north or south point
and the foot of the vertical circle passing through
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