16
4-3
Observing tube
4-3-1 Adjust diopter (See fig.20&fig.21
）
◎
1. Turn coarse focusing knob and fine focusing knob
to focus the specimen when observing the left
eyepiece with left eye.
2. Then rotate the diopter adjustment ring
①
if the
image is unclear when observing the right
eyepiece with right eye.(See fig.20)
★
There is
±
5 diopter on the ring. The number
level to the number on the base is your eye’s
diopter. The “·”on the side has a function for
marking. (See fig.20)
★
Remember your eye’s diopter, so that you
could use next time.
◎
1. Turn coarse focusing knob and fine focusing knob
to focus the specimen when observing the right
eyepiece with right eye.
2. Then rotate the diopter adjustment ring
④
if the
image is unclear when observing the left eyepiece
with left eye. (See fig.21)
★
The user could select any side of the eyepieces as
a standard of reference if there has
diopter
adjustment ring on both eyepiece tubes, then
adjust the other. The eyepiece which selected as
a standard of reference must line up with “0”.
4-3-2 Adjust Interpupillary distance (See
fig.21 & fig.22
）
When using two eyes to observe, hold the base of
the prism and rotate them around the axis until
there is only one field of view. (See fig.22)
The “·”
①
on the side has a function for marking
②
.
The number is the interpupillary distance. (See
fig.22)
Range
：
50
～
75mm
◎
When use XD20, the pointer is below the right
eyepiece base, see
①
in fig.22. When use XD30,
the pointer is above the left eyepiece base, see
⑤
in fig.21.
★
Remember your interpupillary distance, so that
you could use next time.
Fig 20
Fig 21
Fig 22
