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eyepiece and bring it into focus by adjusting the focus knobs (20,21).
2) Then observe the specimen with your left eye only through the left eyepiece. If the
specimen is not in focus, rotate the diopter ring (2) until a sharp image is obtained.
3) Since both sides are adjustable, you may also do the above in the opposite way, in
other words, left eye first and right eye second.
3.8 Adjusting tension knob
The tightness of the tension adjustment collar (19) has been pre-set at the factory. If
the mechanical stage (8) drops by itself, rotate the tension adjustment collar (19)
located inside the focus knob (20) on the power switch side until the tension is in
maintained.
