Bresser National Geographic 90-11100 Mode D'emploi page 17

Version 2
Fix the tripod to the tripod head with the help of the wing screw, washers and wing nuts (Fig. 1). Attach
the middle span to the tripod spans with the small screws (Fig. 2). The golden circle on the middle span
must be pointing upwards. Finally, screw the accessories caddy (14) onto the middle span.
Next, screw the vertical fi ne adjustment to the protruding silver metal supports on the telescope tube. It
is best if you let someone help you. Then you need to attach the telescope tube to the tripod. To do so,
use the spiral screw with the washers to screw the tube to the tripod head (Fig. 5). Attach the locking
screw for the vertical fi ne adjustment to the tripod head yoke (Fig. 6).
Version 1+2
Depending on the telescope model you have, screw your viewfi nder or LED viewfi nder to the holder
(Version 1, Fig. 3) or insert it directly (Version 2, Fig. 3). Then affi x the viewfi nder with screws. Check
carefully which step is right for your viewfi nder.
Take the lens cap off the eyepiece (6). You can now place the zenith mirror (16) into the eyepiece
holder and secure it with the small screw on the connector (Fig. 4). Next, set the eyepiece (15) into
the opening of the zenith mirror (16) (Fig. 4). 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.
Which eyepiece is right?
It is important that you always choose an eyepiece (15) with the highest focal width for the beginning
of your observation. Afterwards, you can gradually move to eyepieces with smaller focal widths. The
focal width is indicated in millimeters 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:
Formula for calculating magnification:
Focal length (Telescope) ÷ Focal length (Eyepiece) = Magnification
Examples:
600 mm
600 mm
600 mm
Use of the moon fi lter
If the image of the moon is too bright for you, you can screw the green moon fi lter (17) into the bottom of
the thread of the eyepiece (15). Then you can set the eyepiece normally into the zenith mirror (16). The
image that you see by looking through the eyepiece is now greenish. The moon appears less bright,
so observation is more pleasant.
÷ 20 mm
÷ 12.5 mm
÷ 4 mm
= 30 X
= 48 X
= 150 X
EN
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