Bresser 175x, Инструкция по эксплуатации

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secured in place with a clamping screw in the axis notch
provided.
Your telescope is now ready for use.
Part II – Handling
1. Handling – telescope mount:
Your telescope mount is of a new type allowing you to make
two different types of observation.
A: Azimuth = ideal for terrestrial use.
B: Parallactic = ideal for celestial observation.
Re A.
In azimuth use the telescope is moved horizontally and vertically.
1. Undo the polar vertical clamping screw (illustration 14a, X) and
lower the incline plate until it is horizontal (to the stop). Retighten
the polar height fastening screw.
2. Undo the vertical clamp (illustration 15 A) and move the main
tube to a horizontal position. The re-tighten the clamps.
The telescope can now be moved horizontally and vertically using
the flexible shafts (illustration 1, 14+15).
Re B.
2. Handling. Night use.
A dark site is very important at night as light would interfere with
observation focus and detail visibility.
Allow your eyes to adjust to the darkness after leaving a lighted
room. After about 20 minutes you can begin celestial observation.
Do not use the telescope from within enclosed spaces. Position
your telescope and accessories about 30 minutes before
observing to ensure temperature compensation in the main tube.
Make sure the telescope is on a flat stable surface.
3. Setup - alignment - basic siting.
Undo the polar height clamping screw (illustration 14a X) and
move the inclined plate (illustration 15 B) to the latitude of your
location using the holding rod table as a rough guide. Turn the
tripod so that the N mark faces north. The top of the inclined plate
should also face north (illustration 14b). The latitude setting rod
(illustration 14a Y) points south.
4. Setting latitude.
Determine latitude of your location using a street map, atlas or the
Internet. Germany is between 54° (Flensburg) and 48° (Munich)
degrees of latitude.
Undo the polar height adjustment clamping (illustration 14 X) and
set the angled plate until the figure on the latitude adjustment rod
(illustration 14 Y) is that of your location, e.g. 51°)
5. Turn the declination axis (illustration 15 C) incl. telescope
mount 90°.
Set the tube the right way round (see illustration / marking) in the
mounting and tighten the clamping screw. The telescope
eyepiece projection now points to the ground and the lens to the
polar star. Undo the latitude setting clamping and the DEC axis in
that sequence and get the polar star in the middle of the
eyepiece field of vision. Then re-tighten the clamping. The tripod
may not now be moved or adjusted again as this would misalign
it. The telescope is now correctly aligned. This procedure is
essential so that celestial objects are tracked.
6. Tracking and observation positionin
Tilt the main telescope (main tube) 90° (illustration 15 C). Turn it
180° to the right or left until the objective lens shows
skywards.
Tighten all clamping (illustration 13 Y + illustration 15 A) so that
tracking can be done using the flexible shaft.
Manual use of the hours axis (R.A. axis) via the flexible shaft
(illustration 15 D) compensates for the earth's rotation so that
objects remain always in the eyepiece visual field. If you want to
move to another object undo the clamping (illustration 13 Y
+ illustration 15 A), rotate the main tube appropriately and then
re-tighten the clamping. Fine adjustment is done using the flexible
shaft (illustration 1 14+15).
7. Handling – Viewfinder:
The telescope is now roughly aligned and adjusted.
In order to obtain a comfortable observation position, you should
loosen the screws at the tube mounting (Fig. 1, 8), so that you can
rotate the telescope tube. Bring the eyepiece and the
view-finder into a position in which is comfortable for you to look
through both.
The fine alignment is done by using the finder scope. Look
through the finder scope and centre Polaris (Fig. 16) in the middle
of the finder scope (Fig. 17).
For fine adjustments use the flexible handles of the horary axis
(Fig. 15, D) and of the declination axis (Fig. 15, E).
8. Handling - Observation:
After you have located the pole star in the viewfinder, if you look
through the eyepiece, the pole star will be visible.
If necessary, you can with help of the flexible handles align the star
more exactly, just as you can adjust the definition by using the
focussing wheel (Fig. 15, F).
Furthermore, you can now, by changing the eyepiece, increase the
magnification. Note that the magnification of the stars can hardly
be seen.
9. Handling – Find a star:
Initially it will be difficult for you to find your bearings in the
firmament, since the stars and the constellations are always
moving and according to season, date and time their position in
the heavens will change. The pole star is the exception. It is a fixed
star and the starting point for all star maps.
At the beginning, you should look at some well known
constellations and star groups order that are visible the whole year
over. The position of the heavenly bodies is however dependent
on date and time.
If you have aligned your telescope accurately on one of these
stars, you will find that it has vanished your visual field after a few
minutes. To even out this effect, you must turn the
flexible handle (Fig. 15, D) the horary axis and your telescope will
follow the trajectory of this star.
10. Handling – Accessories:
Your telescope comes with three eyepieces (Fig. 2, 18).
By interchanging the eyepieces you can alter the magnification of
your telescope.
HINT:
Eyepieces enlarge the (not directly visible) picture of the
telescope’s prime focus. The less the eyepiece’s focal
lengths is, the stronger is the magnification. So various
eyepieces are needed to reach different magnifications.
Begin every observation with a low magnification (20mm
eyepiece).
HINT:
The latitude of your observation site can be found in
maps or in the internet. A good source of information is
www.heavens-above.com. After checking “anonymous
user” > “select” you may choose your land and city.
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