22 22
On the nder holder, there are adjusting
screws for the nder (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 nderscope is
then secure.
Before beginning an observation, it is abso-
lutely necessary that you align the ndersco-
pe – the nderscope 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 nd, clearly dened 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 eld of
vision when you look through the eyepiece.
The image reproduced will be upright, but
rotated around its vertical axis (you will see a
mirror-image). In the nder, 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 n-
derscope while looking continuously through
the nder. Continue to turn until the nder’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 nderscope:
Turn the front lens mount (23) one to two
rotations to the left. Now you can adjust the
counter-ring (23a) by itself.
Finally, in the same way (by opening and clo-
sing the clamp screws) secure the 20-mm
eyepiece in the zenith mirror.
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 nder holder (24) com-
pletely into the nder holder base on the te-
lescope tube (Figure 10). The nder holder
will snap into place. Be sure that the objective
lens on the nder is pointing in the direction of
the front tube opening.
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