7
eyepiece, at the same time, adjust the diopter ring of the left eyepiece
tube(diopter difference compensation)to make the image of left eyepiece clear as
same as the right eyepiece.
3.2.5 Focusing unit
（
Fig.4
）
Usually 10X objective with large field of view and long depth of field should
be used for focusing adjustment first.
Take 10X objective into bright path, then observe the specimen with right
eyepiece by right eye and turn coarse focusing knob to find the image, then turn
slowly fine focusing knob to make the image clear.
All objectives of our microscope are precisely adjusted, and approximate
clear image should be found with the other objectives after getting the clear
image with 10X objective. If the image isn’t enough clear with the other
objectives, please turn fine focusing knob slightly to find the satisfactory image.
▲Don’t rotate the left & right coarse and fine focusing knobs in reverse
direction at the same time, if so, the focusing system will be damaged.
▲Don’t directly pull objective to turn nosepiece when user changes the different
objectives,if so, optical quality of microscope possibly be affected.The right way
Fig. 4 Coarse & fine focusing knobs and tension adjusting knobs
Right coarse
focusing knob
Left fine
focusing knob
Left coarse
focusing
knob
Tension
adjusting knob
Right fine
focusing knob
