Bresser NATIONAL GEOGRAPHIC TELE-MICRO SET Mode D'emploi page 30

Parts overview
1. Zoom Eyepiece and Eyecup
2. Focus knob
3. Objective turret
4. Stage
5. On/off switch ( illumination)
6. Electronic light source
7. Base with battery compartment
8. Battery compartment
9. Cover plates
1. What is a microscope?
A microscope contains two lens systems: the eyepiece and the objective. We're presenting these systems
as one lens each so that the concept is easier to understand. In reality, however, the eyepiece (1) and the
objective in the turret (3) are made up of multiple lenses.
The lower lens (objective) produces a magnified image of the prepared specimen (10). The picture, which
you can't see, is magnified once more by the second lens (eyepiece, 1), which you can see as the 'micro-
scope picture'.
2. Assembly and location
Before you start, choose an ideal location for using your microscope. It's important that you choose a
spot with enough light for normal observation. Furthermore, it is recommended that you place the micro-
scope on a stable surface, because a shaky surface will not lead to satisfactory results.
3. Normal observation
For normal observation, place the microscope in a bright location (near a window or desk lamp, for example).
Turn the focus knob (2) to the upper stop, and set the objective turret (3) to the lowest magnification.
Now, turn on the light using the switch on the microscope base. You'll find further tips about the light source in
the next section. Now, place a prepared slide (10) under the clips on the stage (4), directly under the objective
(1). When you take a look through the eyepiece, you can see the magnified specimen. At this point, you still
might see a slightly fuzzy picture. Adjust the image sharpness by slowly turning the focus knob (2). You can
now select a higher magnification by turning the objective turret and selecting a different objective.
When you do so, note that the sharpness of the picture must be adjusted again for the higher magnifica-
tion. Also, the higher the magnification, the more light you will need for good illumination of the picture.
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10. Blank Slides and Prepared slide
11. Reservoir and Yeast
12. Tweezers
13. Wheel with pinhole apertures
14. Measuring cup
15. Hatchery
16. Smartphone holder