Celestron 44200 Manuel De L'utilisateur page 7

Focusing
To achieve the best focus for your microscope, not only can you make adjustments with the focus knobs, but you can also
adjust the left diopter ring (2) of the left eyepiece (1) as well as the interpupillary distance between the eyepieces:
1. Rotate the knurled ring on the objective lens housing (5) to the 2x position (as seen looking straight at the
microscope). It is best to begin viewing a specimen at low power, then switch to high power when needed.
2. Turn the focus knob (12) until the specimen comes into focus. If there is not enough travel in the focuser mechanism
to reach focus, it may be necessary to loosen the pillar stand locking knob (13) and raise or lower the entire binocular
head assembly (3) until the image becomes sharp.
3. While looking through the eyepieces, adjust the interpupillary distance by rotating both eyepieces and the eyepiece
holding mechanisms up and down until the whole field of view can be observed through both eyes at the same time.
The reason this is necessary is that people have varying distances between their eyes.
4. Close your left eye and focus the image until sharp looking through your right eye. Then, close your right eye and turn
the left eyepiece diopter ring (2) until the image is in sharp focus through the eyepiece. Now the interpupillary
distance is set and you will only focus with the focus knob (12).
5. If higher power is desired, rotate the objective lens housing (5) to the 4x position (as seen looking straight at the
microscope) and refocus until the specimen becomes sharp.
Rotating the Binocular Head
The head of your microscope can be rotated 360°. Therefore, you can view from any position. To change positions of the
head, loosen the binocular head tension screw (4) and rotate the head (3) to the position desired and then tighten the
binocular head tension screw (4).
Replacing Illuminator Bulbs
Top Illuminator Bulb – to replace the bulb:
1. Remove the binocular head mechanism ((3) from the pillar stand (14) by loosening the pillar stand locking knob (13)
but first remove the pillar stand safety screw (15).
2. Lay the binocular head (3) on its side so you can easily change the bulb in the top illuminator (11).
3. Gently remove the illuminator bulb from the bulb holder of the top illuminator – see Figure 2a.
4. Replace the bulb with a new one of the same type – halogen 12volt, 15watt.
5. Put the binocular head (3) back onto the pillar stand (14) and tighten the pillar stand locking knob (13) in the position
desired.
6. Replace the pillar stand safety screw (15).
Bottom Illuminator Bulb – to replace the bulb:
1. Remove the stage plate (7) so that you can easily see the bulb holder inside the base (8).
2. Raise the head (3) up by turning the focus knob (12). If this is not high enough, then loosen the pillar stand locking
knob (13) and raise the head to a higher position (hold firmly when doing this) and then tighten the pillar stand
locking knob (13).
3. Gently remove the illuminator bulb from the bulb holder of the bottom illuminator – see Figure 2b.
4. Replace the bulb with a new one of the same type – halogen 12volt, 15watt.
5. Put the stage plate (7) back in the base (8).
Figure 2a Figure 2b
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