Celestron 44320 User Manual download pdf (Page 4)

Viewing a speciMen

Carefully place a specimen slide under the stage clips Fig.

1 (9) and center the specimen directly over the hole in the

center of the stage Fig. 1 (5) – Figure 4a shows the stage

area with the hole in the center and Figure 4b shows a

specimen slide centered over the hole in the stage. It will

take some experimenting to place slides or objects in the

center of the stage as the image you see is upside down

and reversed but after some usage you will have an easy

time centering. Read the sections below on Focusing,

Changing Power, and Illumination before proceeding.

You are now ready to focus and view the specimen, but ﬁrst

you must take some precautions so you do not damage a

specimen slide or valuable object. When using the higher

powers while you are focusing, make sure that the objective

lens does not hit the slide or object being viewed.

MIcroScope operatIon

Figure 4a Figure 4b Figure 5

Focusing & changing power (MagniFication)

Now that the specimen slide (or object) is placed directly

under the objective lens, use the focus knob Fig. 1 (8) to

focus on the specimen. Note that for very small objects,

you should set them on the clear slide with a recessed hold

in the center.

1. Always start with the lowest power (4x objective lens) and

have the zoom eyepiece at the 10x position, all the way

counterclockwise (when you are facing the microscope

from the front) until it stops, so that the total power is 40x

– this is the most useful power for solid objects.

2. For slightly higher power, you can rotate the knurled ring

on the zoom eyepiece (see Figure 5) clockwise to obtain

powers of 40x to 80x (or anywhere in between) as you

continue rotating to the 20x eyepiece position. Note

that you will have to refocus whenever you rotate the

eyepiece to obtain a sharp focus.

3. For much higher powers, you will have to rotate the

nosepiece Fig. 1 (3) to change the objective lens to 15x

(provides total power of 150x to 300x depending on what

position you have the zoom eyepiece in or 30x provides

total power of 300x to 600x). You rotate the nosepiece by

holding the microscope above the nosepiece with one

hand and rotate the nosepiece with the other hand until it

clicks at the position. Be cautious not to let the objective

lens touch the specimen slide or object when changing

to higher powers – you should turn the focus knob rst

to lower the stage to a low position. Note the power

range of the objective lens you are using is shown on the

nosepiece after it clicks into position.

4. At the highest powers, your views will be greatly

magniﬁed but somewhat darker. The most enjoyable

views can be at the lower powers which have a wider

ﬁeld of view and brighter illumination.

illuMination

To get the sharpest and best views, the illumination

(lighting) will have to be adjusted.

1. The top illuminator Fig. 1 (11) is used only for solid

objects (not specimen slides) so that light shines down

onto the object. Push the button on the top of the

pen light illuminator to turn it on/off. You can change

the brightness by moving the illuminator up/down or

by rotating it left or right. After some usage, you can

determine the best way of adjusting the light to provide

the most pleasant views.

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Celestron 44320 User Manual Page 4

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