9
3. 2 Focus Adjustment
3.2.1
Adjusting the rotation tension of the
focus adjustment knob (fig.9
、
fig.10)
1
．
Rotate the focus adjustment knob
①
to move the
slider
②
to a lower place for fear that the zoom
body drops down suddenly if the tension is
decreased too much.
2
．
Hold
the focus adjustment knobs
①
with both
hands, stop the left knob and rotate the right
knob to increase or decrease the focus knob
tension.
3. Rotate two sides of the adjustment knobs in the
same direction (otherwise it will get loose) to
move the zoom body up and down to focus on
the specimen.
3.2.2 Changing the magnification
1.
The zooming knots located at two sides of the
zooming body could change the magnification of
the specimen image.
2. Total Magnification =
Magnification of zoom
body
×
magnification of eyepiece
Note: While using the auxiliary objective, it
should be multiplied by its magnification in
addition .
3.3 Illumination
1. Adjustable illumination for both LEDs (top
and bottom).
2. Brightness adjustment: the right brightness
adjustment knob
③
is used to adjust the bottom
illumination, and the left brightness adjustment
knob
④
is used to adjust the top illumination.
Each knob have its own on-off. Rotate
anticlockwise to open the power, and continue
would increase the brightness, keeping rotating
clockwise would decrease the brightness until it
is power off.
③
P10
④
P9
②
①
