Bresser messier R-80 Gebrauchsanleitung Seite 13

Part III – Appendix
1. Possible observation targets
In the following, we like to present to you a choice of very
interesting and easy-to-find celestial objects. On the depending
pictures at the end of the manual you will see how they will
appear in the eyepiece of your telescope:
The moon (Fig. 31)
The moon is the only natural satellite of the earth.
Diameter: 3,476 km
Distance: 384,000 km (average)
The moon is well-known since thousands of years. He is the
second-brightest celestial object after the sun. Because the
moon circles around the earth, he changes periodically its
inclination to the sun; therefore we see changing phases. The
time for one complete lunation is 29.5 days (709 hours).
Constellation Orion: The great Orion nebula / M 42 (Fig. 32)
Right Ascension: 05h 33' (hours : minutes)
Declination: -05° 25' (Degrees : minutes)
Though it is 1,600 light years away, the Orion nebula (M 42) is
the brightest nebula object at the sky – visible even with naked
eyes and a worthwhile object for telescopes of all kinds and
sizes. It consists of a gigantic cloud of hydrogen gas with a
diameter of hundreds of light years, taking a field on the sky of
10°.
Constellation Lyra: The Ring Nebula / M 57 (Fig. 33)
Right Ascension: 18h 52'
Declination: +32° 58'
Distance: 4,100 light years
The famous Ring Nebula is often called the prototype of
planetary nebulae; he belongs to the northern hemisphere
summer sky's pieces of splendour. Recent investigations have
shown that he is a ring of light-emitting matter that surrounds its
central star (only visible in bigger telescopes). If one could look
onto its top, he would see a structure like the Dumbbell Nebular
/ M 27
Constellation Vulpecula (little fox):
The Dumbbell Nebula / M 27 (Fig. 34)
Right Ascension: 19h 59'
Declination: +22° 43'
Distance: 1,250 light years
The Dumbbell Nebula / M 27 was the first planetary nebula ever
found. On July 12th, 1764, Charles Messier discovered this new
and fascinating class of objects. We can see it directly from its
equatorial pane. If it could be viewed from top, we would appear
like the Ring Nebula / M 57. This Object can even be viewed at
average weather conditions at low magnifications.
2. Troubleshooting:
Mistakes:
No picture
Blurred picture
No focus possible
Bad picture
Viewing object visible
in the finder, but not
through the telescope
Heaviness in the flexible
handles on the axis
over the shaft
Despite using star
diagonal prism
the picture is
"crooked"
3. Warranty
The period of warranty is 2 years, beginning on the day of
purchase. Please keep the cash receipt as evidence of purchase.
Devices which become defective during the warranty period can
be returned to the dealer where the device was bought. The
repaired device or a new one will then be returned to you. In the
case of defects which occur after the end of the warranty period,
the devices can also be returned. However, repairs which
become necessary after the end of the warranty period will be
subject to a service fee.
Important:
Make sure to return the microscopes carefully packed in the
original packaging in order to prevent transport damage.
Please also enclose the cash receipt (or a copy).
This guarantee does not imply any restriction of your
statutory rights.
Your dealer:
Name: ..............................................................................................
Postcode / City: ..............................................................................
Street: ..............................................................................................
Telephone:........................................................................................
Date of purchase: ............................................................................
Signature: ........................................................................................
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Help:
Remove dust protection cap and
sunbathe-shield from the objective
opening.
Adjust focus using focus ring
Wait for temperature to balance out
Never observe through a glass
surface
Adjust finder (See Part I:
8. Construction)
Telescope and counter
weight not balanced
The star diagonal prism
should be vertical in
the eyepiece connection
GB