Bresser Sirius 70/900 AZ Mode D'emploi page 11

5. Tube
Now hold the telescope main tube (1) as shown in the middle of the
alt-azimuth mount (9) and screw the screws (8) into the tube from both
sides (Fig. 8).
6. Vertical fine adjustment
To mount the vertical fine adjustment (17) first push the adjustment rod
through holding device (X) on the mount (Fig. 9a).
Then undo the screw (Y) for the adjustment rod and insert on the other
end of the rod. Then tighten it in place (Fig. 9b).
Important: Do not screw the vertical fine adjustment fastening
screw too tightly. If you do the main tube will not be
vertically adjustable.
RISK OF BLINDNESS!
Never use this device to look directly at the sun or in
the direct proximity of the sun. There is a RISK OF
BLINDNESS!
7. Assembling the LED Viewfinder
Note: The LED Viewfinder scope has a battery safeguarded
against discharge with plastic foil when shipped. This must
be removed before first use (fig.1d).
Viewfinder scope assembly:
LED Viewfinder scope with Quick Insert
The LED finder scope (Fig. 1a) and mounting constitute a single unit.
Slide the foot of the LED finder scope completely into the appropriate
base on the telescope main tube (Fig. 10, X). The finder scope mount-
ing will snap in place.
Important: Make sure the LED finder scope lens points towards
the main tube end (Fig. 1, 4).
8. Aligning the finder scope
The LED finder scope must be adjusted before use. This means that the
LED finder scope and the telescope tube must be aligned in parallel.
Insert the eyepiece with the greatest focal length in the zenith mir-
ror (Fig. 12b, refracting telescopes only) or directly in the eyepiece
supports (Fig. 13, reflecting telescopes only). Point the telescope at
a significant object approximately 300 meters away (e.g. house gable,
church tower top, etc.) and adjust until it appears in the centre of the
field of vision (Fig. 15 A).
Then turn the LED finder scope (2) on using the On/Off switch (Fig. 1b,
Z). Select setting „2" in daylight, setting „1" for nighttime.
Look through the LED finder scope and align it by turning the horizontal
(Fig. 1b, X) and vertical (Fig. 1b, Y) adjustment screws until you see
the red dot in the centre of the image (Fig. 15, B). Finder scope and
telescope are now adjusted to one another.
9. Protection-caps
In order to protect the inside of your telescope from dust and filth, the
tube opening is protected by a dust-protection-cap (Fig. 11, X).
For observation remove the cap from the opening.
10. Inserting the eyepiece
10.1. On refracting telescopes
Two eyepieces (18) and a star diagonal prism (19) are supplied as
standard with this telescope.
With the eyepieces, you can decide which magnification you want for
your telescope.
Before you insert the eyepiece and the star diagonal prism, you must
remove the dust-protection-cap from the eyepiece connection tube (6).
Loosen the screw (Fig. 12a, X) on the eyepiece connection tube and
insert the star diagonal prism. Retighten the screw (X) on the eyepiece
connection tube.
Then open and close the clamping screw (Fig. 12b, X) to fasten the 20
mm eyepiece in the zenith mirror in the same way.
Make sure that the eyepiece is pointing vertically upwards. Otherwise
loosen the screw (Fig. 12a, X) on the eyepiece connection tube and
rotate the star diagonal prism into the vertical position. Remove the dust
cap from the main tube end.
10.2. On reflecting telescopes
Please loosen the clamping screw on the eyepiece supports (6).
Remove the eyepiece supplied (18) with the 20 mm maximum focal
length and insert it directly in the eyepiece supports. Hand tighten the
clamping screws (Fig. 13, X). Remove the dust cap from the main tube
end.
Part II – Handling
1. Mount
Your telescope is equipped with an azimuth mount that is easy to use.
You can adjust your telescope horizontally and vertically with it.
2. Setup
A dark place is essential for observations because light of all kinds (e.g.
street lamps) disturb the visible details of the sky. If you leave a bright
room at night, your eyes need approximately 20 minutes to reach full
night adaptation. After this time, your observations can be started.
Don't observe from enclosed areas and put your telescope in location,
with the accessories, 30 mins before beginning observation, in order to
guarantee a temperature balance.
You should also make sure that the telescope is placed on a stable and
even ground.
3. Vertical and horizontal adjustment
3.1. Vertical adjustment
Undo the fastening screw (Fig. 14a, X) and move the tube up or down.
Once you find the right setting turn the fastening screw hand tight.
This makes the adjustment a fixed one.
Minor changes can be carried out by slight turns of the adjustment wheel
(Fig. 14b, Y). Before re-adjusting undo the fastening screw (Fig. 14a, X).
3.2. Horizontal adjustment
To move the telescope horizontally undo the fastening screw (Fig. 16,
Z) and turn the device in the desired direction.
Once you've reached the desired position retighten the fastening screw
hand tight
4. Observation
Aim the telescope at the object to be observed. Look through the LED
finder scope and centre the object in the middle of the viewing field (red
dot) by horizontally and vertically adjusting the telescope.
If you now look through the lens you will see the magnified object.
Turn the focussing wheel to get it into sharp focus if necessary.
You can also change the lens to achieve greater magnification.
i
HINT:
Start each observation with a low-power lens
(20 mm).
5. Finding stars
You will initially have problems orienting yourself in the sky as stars
and constellations are in constant movement and change their position
depending on the season, date and time.
The polar star is the sole exception. It is a fixed star and the starting point
of all stellar maps.
You can see some well-known stars and constellations on the map
that are visible throughout the year. The arrangement of the stars is
dependent on the date and the time, however.
6. Accessories
Your telescope is supplied with a number of accessories as standard
(Fig. 2). Depending on model this may include the following.
6.1. Eyepieces
Change eyepieces to change your telescope's magnification.
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