DN117D-LED
I-SCOPE OPTICS JAPAN
13
●
The
numerical aperture is marked on the objective.
For example, the mark “ 10/0.25 ” means the
magnification is 10×
，
and the numerical aperture is 0.25.
●
If you want to observe the image of the aperture iris diaphragm, remove one eyepiece and look
through the tube. You will see a dark circle encroaching on the bottom of the tube.
3.3.6
Adjusting
the
Interpupillary
Distance
（
Fig.22
）
The interpupillary distance range:
48mm
～
75mm
。
When observing with two eyes, hold on the
left and right prism holders, turn them around
the axis to adjust the interpupillary distance
until the left and right fields of view coincide
completely, as shown in Fig.22.
3.3.7 Adjusting the diopter
（
Fig.23
）
1. Looking through the right ocular with your right
eye, revolve the coarse and fine focusing
adjustment knob to focus on the specimen.
2. Then look through the left ocular with your left
eye. If the image is not sharp, turn only the left
diopter adjustment ring
①
to focus on the
specimen please.
★
The diopter range of the eyepiece is
±
5
diopter. The number aligned to the line on the
viewing head is the diopter in use.
Fig.22
Fig.23
①
