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8.1 Adjusting interpupillary distance
Hold the right and left eyepiece tube with both hands
and adjust the interpupillary distance by moving the
two parts until one circle of light can be seen. If two
circles appear, the interpupillary distance is too big,
and if two overlapped circles appear, the interpupilla
-
ry distance is too small. (Fig. 21)
8.2 Focus
Put the sample to be observed on the stage plate
and focus the sample using the focusing knobs of the
stand
①
. If necessary adjust the height of the micro
-
scope head along the vertical stand. Remember to
lock the lock screw
②
after aligning the height of the
microscope. (Fig. 22)
8.3 Adjusting the tension of the focus knob
•
This adjustment allows to increase or decre-
ase the tension of the knob by avoiding an
involuntary descent of the microscope body
under its own weight. Adjust the tension just
above the point where the focus is stable.
Grab the knobs
③
with both hands and, holding right
knob rotate the left one. Tension increases or decre
-
ases according the sense of rotation of the left focus
knob.
8.4 Dioptric compensation
This compensation makes possible for people wea
-
ring glasses to adjust the microscope to their eyes
and use the microscope without glasses.
1.
Put the zoom down to the lowest magnification
④
and focus the specimen with the focusing knobs
①
. (Fig. 24)
2.
Put the zoom to the maximum magnification and
repeat the focusing.
3.
Return to the lowest magnification: the specimen
will be out of focus.
4.
Adjust the diopter compensation ring of the right
eyepiece until the image of the right eyepiece is
clear and sharp. Repeat the procedure for the left
eyepiece.
5.
Check the focus of the image for the whole zoom
range. It should be perfectly parfocal (focus is
maintained during the change of magnification).
8. Using the microscope
Fig. 21
Fig. 22
Fig. 23
Fig. 24
④
②
③
①
INCREASE
DECREASE
HOLD
①
