12
BM-300
3.3.6 Adjusting the Interpupillary Distance
（
Fig.21
）
The interpupillary distance range:
55mm
～
75mm
。
While looking through the eyepieces, move both
eyepieces until the left and right fields of view
coincide completely.
3.3.7 Adjusting the Diopter
（
Fig.22
）
1.
Turn the eyepiece
①
to adjust the diopter while
looking through it.
★
The diopter range of the eyepiece is ±5 diopter.
The number aligned to the line on the viewing
head is the diopter in use.
3.3.8 Adjusting the tension adjustment collar
（
Fig.23
）
Turn the tension adjustment collar
①
with
your fingers .When the collar is turned in the
direction of the arrow, tension of the coarse
adjustment knob
②
increases. Turning the collar
in the opposite direction decreases the tension.
If the nosepiece descends on its own or if the
specimen gets out of focus quickly even when it is
brought into focus using the fine adjustment knob
③
, it means the tension of the coarse adjustment
knob is too low. Turn the collar in the direction of
the arrow to increase the tension
Fig.19
Fig.20
