3
Using the microscope
Getting started
•
Unpack the microscope and make sure all parts are available.
•
Move the stage to the lowermost position using the focusing knob.
•
Make sure the batteries are correctly installed in the battery compartment; insert new batteries
if required.
•
Insert the eyepiece into the eyepiece tube.
•
Slowly adjust the illumination brightness, from dark to light.
Focusing
Selecting the objective
• Place a specimen on the stage and fix it with the holders.
•
Select the 4x objective rotating the revolving nosepiece.
•
Move the specimen to place its thickest part exactly under the objective.
•
Rotate the focusing knob to slowly raise the stage until the objective is close to the specimen;
keep checking the distance between the objective and the object to avoid their contact.
CAUTION:
The objective should not touch the specimen, otherwise the objective or/and the specimen
might be damaged.
•
Look through the installed eyepiece and lower the stage slowly rotating the focusing knob until you
see the specimen image.
•
Such adjustment protects the frontal lens from contacting the object when you use objectives of other
magnifications; though, slight refocusing might be required.
•
If the image is too bright, rotate the diaphragm disk until the passing light ray is reduced to a
comfortable brightness level. If the image is too dark, select a larger aperture to increase the light ray.
Start your observations with the lowest magnification objective and select a specimen segment for
detailed research. Then move the specimen to center the selected segment in the field of view, to
make sure it keeps centered when the objective is changed to a more powerful one. Once the segment
is selected, you should center its image in the microscope’s field of view as precisely as possible.
Otherwise, the desired segment might fail to center in the field of view of the higher power objective.
Now you can switch to a more powerful objective by rotating the revolving nosepiece. Adjust the image
focus if required.
Specifications
Type
biological
Magnification, x
40–640
Head
monocular, inclined 45°
Optics material
optical plastic
Body material
plastic
Eyepiece tube diameter, mm
30
Eyepieces
WF10x–WF16x
Revolving nosepiece
3 objectives
Objectives
4х, 10х, 40х
Stage, mm
diameter 82, with specimen holders
Stage moving range, mm
0–15, vertical
Focusing
coarse
Illumination
lower LED illumination with adjustable brightness
Power source
2*АА batteries
Levenhuk K50 experiment kit
yes
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