Bresser junior 8851300000000 Instrucciones De Uso página 13

12. Microscope instruments
13. Wheel with pinhole apertures
14. Measuring cup
15. Hatchery
16. MicroCut
17. Smartphone holder
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 objec-
tive in the turret (3) are made up of multiple lenses.
The lower lens (objective) produces a magnified image of the prepared
specimen. The picture, which you can't see, is magnified once more by the
second lens (eyepiece, 1), which you can see as the 'microscope 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 observa-
tion. Furthermore, it is recommended that you place the microscope 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 pre-
pared slide under the clips on the stage (4), directly under the objective
(1). When you take a look through the eyepiece, you can see the magni-
fied 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 magnification. Also, the higher the magnification, the
more light you will need for good illumination of the picture. The wheel
with pinhole apertures (13) below the microscope stage (4) will help you
in viewing very bright or clear-sighted preparations. Turn the wheel (13)
till the best contrast is achieved.
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