14
STEINDORFF
®
The numerical aperture is marked on the
objective. For example, the mark “10/0.25”
means the magnification is 10x
，
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.
4.2.7.
Adjusting the Interpupillary Distance (Fig. 27)
Interpupillary distance range: 55mm ~ 75mm
When observing with two eyes, hold onto the left and right
prism holders, turn then around the axis to adjust the
interpupillary distance until the lift and right fields of view
coincide completely, as shown in Fig. 27.
4.2.8.
Adjusting the diopter (Fig. 28)
1.
Look into the left ocular with your left eye, then
revolving the coarse knob to focus on the
specimen.
2.
Then use the right eye to look into the right ocular.
If the image is not sharp, use the diopter
adjustment ring
①
to adjust.
Fig. 27
Fig. 28
Fig. 26
The right size of the aperture
diaphragm
①
Specimen
Image of Aperture Iris Diaphragm
