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2.
Use the handles and focusing knob to focus on the surface of the cervix (Fig. 13).
Fig. 13
3.
The tension of the focusing knobs has been pre-set by factory technicians.
To increase the focusing tension, hold the left knob with your left hand; use your right
hand to turn the right knob clockwise. To check the tension, release your left hand and
rotate the knob with either or both hands in the same direction. If it is not tight enough,
repeat the above step until the proper tension is set.
To decrease the focusing tension, hold the left knob with your left hand; use your right
hand to turn the right knob COUNTERCLOCKWISE. To check the tension, release your left
hand and rotate the knob with either or both hands in the same direction. If it is not
loose enough, repeat the above step until the proper tension is set.
Zoom Head Adjustments and Setting Procedures
Interpupillary Distance Adjustment (Fig. 14) – change the distance between eye-tubes until
you get a single non-overlapping image (range is 55mm to 75mm).
Fig. 14
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