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the eyepiece screen by focusing the eyepiece lens (3) and then
the objective lens (7, Fig.2).
Focusing
To obtain sharp image at other distance adjust the lens focus (7,
Fig.1) leaving eyepiece setting intact. You should be able to
obtain a sharp image for distances from 2-10 m to infinity.
If you wear eyeglasses or NBC protective mask, you may like to
fold the rubber eyecup.
Using Unit with headgear
Prior to using the unit with the headgear adjust all the
straps to the head size.
When wearing the unit the eye-relief (the distance
between your eyes and the eyepieces) should be 15-22
mm. In order to achieve this, loosen the locking screw (8,
Fig.1) and set a comfortable distance between the eyes and
the eyepieces; then tighten the locking screw (8, Fig.1).
Interpupillary distance
The unit is designed to accommodate interpupillary distance of
58-72 mm without any additional adjustment and should be
comfortable for 99% of adults.
Installation of interchangeable lenses
Do not apply an excessive force when changing the lenses.
The following procedure is identical for 1x, 4x, 5x or 8x lenses.
