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Bresser 91-18001 National Geographic Manual

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8
General Warnings
• Risk of blindness — Never use this device to look directly at the sun or in the direct proximity of the
sun. Doing so may result in a risk of blindness.
• Choking hazard — Children should only use the device under adult supervision. Keep packaging
material, like plastic bags and rubber bands, out of the reach of children, as these materials pose a
choking hazard.
• Risk of fi re — Do not place the device, particularly the lenses, in direct sunlight. The concentration
of light could cause a fi re.
• Do not disassemble the device. In the event of a defect, please contact your dealer. The dealer will
contact the Service Centre and can send the device in to be repaired, if necessary.
• Do not expose the device to high temperatures.
• The device is intended only for private use. Please heed the privacy of other people. Do not use this
device to look into apartments, for example.
Parts overview
1. Focus wheel
2. Zenith mirror
3. Eyepieces (6 mm, 20 mm)
4. Telescope (Telescope tube)
5. Lens hood
6. Objective lens
7. Locating screw for the vertical fi ne adjust-
ment (for moving upward and downward)
8. Locating screw for the vertical axis
(for turning to the right and left)
9. Tripod legs
You should take some time to decide where you would like to set up your telescope. Choose a stable
surface like a table. Mount the telescope to the tripod with the locating screw for the vertical fi ne adjust-
ment (7) (Fig. 1). You can now place the zenith mirror (2) into the eyepiece holder and secure it with the
small screw on the connector (Fig. 2). Next, set the eyepiece (3) into the opening of the zenith mirror
(2) (Fig. 2). Here too, there is a screw with which you can screw the eyepiece onto the zenith mirror.
Note: First, put the eyepiece with the largest focal width (e.g. 20 mm) onto the zenith mirror. While
you'll get the least amount of magnifi cation, it will be easier for you to view things.
Azimuthal mounting
Azimuthal mounting means that you can move your telescope up and down, left and right, without hav-
ing to adjust the tripod.
Use the locating screw for the vertical fi ne adjustment (7) and the locating screw for the vertical axis (8)
to locate and lock onto the position of an object (to focus an object).
Which eyepiece is right?
It is important that you always choose an eyepiece with the highest focal width at the beginning of your
observation. Afterward, you can gradually move to eyepieces with smaller focal widths. The focal width
is indicated in millimetres and is written on each eyepiece. In general, the following is true: the larger
the focal width of an eyepiece, the smaller the magnifi cation. There is a simple formula for calculating
the magnifi cation:
Focal width of the telescope tube : Focal width of the eyepiece = Magnifi cation
… 8 …


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