Niemals mit dem Teleskop in oder in die Nähe der Sonne blicken:
E
rblindungsgEfahr
!
13
OBSERVATION
Observation
Observation with manual operation
After the telescope is assembled and balanced as described, you are
ready for manual observation. Pick an easy-to-observe object on Earth
such as a street sign or traffic light and familiarize yourself with the
telescope's functions. To achieve the best possible result, please observe
the following instructions:
• To locate an object, first loosen the RA clamp (33, Fig. 1d) and the DEC
clamp (17, Fig.1d). The telescope can now move freely around its axes.
First loosen the clamps individually and familiarise yourself with the
individual movements. Then loosen both clamps at the same time. It is
important that you familiarise yourself with all the movements of your
telescope, as handling a parallactic mount can take some getting used
to, especially at night in complete darkness.
• Now use the finder scope to locate the object of your choice. When you
have the desired object in your sights, close the RA and DEC clamps
again.
• The eyepiece of a telescope magnifies the image captured by the
telescope's primary mirror. An eyepiece works like a magnifying glass.
Each eyepiece has a focal length, expressed in millimeters (mm). The
smaller the focal length, the higher the magnification. For example: an
eyepiece with a focal length of 9mm has a higher magnification than an
eyepiece with a focal length of 26mm.
Eyepieces with a lower magnification offer a larger field of view, provide
brighter and higher contrast images and are more comfortable for the
eye during longer observations. At the beginning of an observation, you
should always start with a weaker eyepiece, such as the supplied Plössl
25 mm. When the desired object is centred and focused, you can switch
to a larger eyepiece to magnify the object as high as the observing condi-
tions will allow.
• Once centered, an object can be focused by using the focusing wheels
on the focusing unit (8 Fig. 1b). However, keep in mind that the desired
object will slowly move out of field of view due to the rotation of the earth
on its own axis. This impression is even reinforced at high magnification.
Moon Observations
Point the telescope (picture: (Keep in mind, however, that the moon is not
visible every night) Now practice using the different eyepieces to observe
different details on the moon. There are many different details to look at on
the moon, such as craters, mountain ranges, and grooves. The best time
to observe the moon is during its crescent or sickle phase. At this time,
the sunlight hits the moon at a very shallow angle, giving its appearance
a vivid depth. At full moon there are no shadows to be seen at all, which
makes the surface of the moon look very bright, flat and uninteresting.
Therefore, when viewing the moon, you may want to consider using a neu-
tral density moon filter. Among other things, this not only dampens the gla-
ring light of the moon, but also increases the contrast at the same time.
Tracking of an object
As the earth rotates under the night sky, the stars appear to move from
east through south (where you reach the highest distance above the hori-
zon) to west. The speed with which the stars perform this movement is
called "sidereal velocity".
The parallactic home position
1. Balance the mount; if necessary, adjust the height of the tripod legs.
2. Loosen the RA clamp (33, Figure 1d). Swivel the tube until the counter-
weight rod points directly to the ground (see also Fig. 16a and 16b).
3. If you have not already done so, align the entire telescope assembly, so
that the tripod leg under the counterweight rod faces (approximately)
to the north. Then open the DEC clamp (33, Fig. 1d), so that the optical
WARNING!
Never use a tele-scope for an
unprotected view of the sun! As
soon as you look directly at the
sun, or even at its immediate
surroundings, you risk immediate
and irreparable damage to your
eye. This damage to the eye
usually occurs painlessly and the-
refore without any warning to the
observer that perhaps everything
is already too late and that eye
damage has occurred. Therefore,
never point the telescope or its
viewfinder at or near the sun.
Never look through the telescope
or its viewfinder when it is
moving. During an observation,
children must remain under adult
supervision at all times.
IMPORTANT NOTE:
Objects viewed through the view-
finder appear upside down and
upside down.
Objects observed through the
eyepiece of the main tube, which
sits on the telescope via a zenith
prism, appear upright but also
laterally inverted.
This effect does not interfere with
the observation of astronomical
objects. Incidentally, these effects
occur with all astronomical
telescopes.
