Bresser 70/900 NG Instrucciones De Uso página 19

Finally, in the same way (by opening and clo-
sing the clamp screws) secure the 20-mm
eyepiece in the zenith mirror.
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Be sure that the entrance of the eyepiece (the
end you look into) is facing straight upwards.
This will make observation easier. Alterna-
tively, loosen the clamp screws (21) on the
eyepiece holder and turn the zenith mirror
into this position.
7. Mounting and Adjusting the Finder
Slide the foot of the finder holder (24) com-
pletely into the finder holder base on the te-
lescope tube (Figure 10). The finder holder
will snap into place. Be sure that the objective
lens on the finder is pointing in the direction of
the front tube opening.
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2#
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On the finder holder, there are adjusting
screws for the finder (3) (Figure 1): two clamp
screws (black) and one spring-loaded counter
screw (silver). The clamp screws (black) are
to be screwed (equally as far) in so that you
can feel some resistance; the finderscope is
then secure.
Before beginning an observation, it is abso-
lutely necessary that you align the findersco-
pe – the finderscope and the main telescope
must point to exactly the same position. Here
is the process for alignment:
Take the 20-mm eyepiece, set it into the ze-
nith mirror and aim the main telescope at an
easy to find, clearly defined earthbound ob-
ject (Figure 11, e.g. church steeple, gable of
a house). The object should be at least 200-
300 meters away. Hone in on the object so
that it is exactly in the middle of the field of
vision when you look through the eyepiece.
1!
The image reproduced will be upright, but
rotated around its vertical axis (you will see a
mirror-image). In the finder, however, the re-
produced image will be upright and its sides
will not be reversed, as above. Now turn one
of the two clamp screws (right/left) of the fin-
derscope while looking continuously through
the finder. Continue to turn until the finder's
crosshairs are exactly over the position that
corresponds to what you see when you look
through the eyepiece of the main telescope.
Focusing the finderscope:
Turn the front lens mount (23) one to two
rotations to the left. Now you can adjust the
counter-ring (23a) by itself.
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