BRESSER Junior 8843100 Ultra Lightweight Telescope Instruction Manual

: June 9, 2024
: BRESSER

Table of Contents

Junior 8843100 Ultra Lightweight Telescope
Your telescope consists of these parts:
Assembly
Azimuthal mounting
Before looking through your telescope for the first time
Coordinating the finderscope and the telescope
Which eyepiece is right?
Use of the moon filter
Technical data:
Possible objects for observation:
The Moon
Warranty & Service
Contact
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

Telescope 60/700
Art. No. 8843100

Operating Instructions

Junior 8843100 Ultra Lightweight Telescope

MANUAL DOWNLOAD:

www.bresser.de/P8843100| SERVICE AND WARRANTY:
www.bresser.de/warranty_terms
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TELESCOPE GUIDE:

www.bresser.de/guide| TELESCOPE FAQ:

www.bresser.de/faq
DOWNLOADS:
www.bresser.de/downloads| WARNING:
Never use this device to look directly at the
sun or in the direct proximity of the sun.
Doing so may result in a risk of blindness.

RISK to your child!
Never look through this device directly at or near the sun. There is a risk of BLINDING YOURSELF!
Children should only use this device under supervision. Keep packaging materials (plastic bags, rubber bands, etc.) away from children. There is a risk of SUFFOCATION!

Fire/Burning RISK!
Never subject the device – especially the lenses – to direct sunlight. Light ray concentration can cause fires and/or burns.

RISK of material damage!
Never take the device apart. Please consult your dealer if there are any defects.
The dealer will contact our service centre and send the device in for repair if needed.
Do not subject the device to temperatures exceeding 60 C.

TIPS on cleaning
Clean the lens (objective and eyepiece) only with the cloth supplied or some other soft lint-free cloth (e.g. micro fibre). Do not use excessive pressure this may scratch the lens.
Dampen the cleaning cloth with a spectacle cleaning fluid and use it on very dirty lenses.
Protect the device against dirt and dust. Leave it to dry properly after use at room temperature. Then put the dust caps on and store the device in the case provided.

RESPECT privacy!
This device is meant for private use. Respect othersprivacy do not use the device to look into other peoples homes, for example.

DISPOSAL
Dispose of the packaging material/s as legally required. Consult the local authority on the matter if necessary.

Your telescope consists of these parts:

1 Vertical fine adjustment
2 Focus wheel
3 Focus tube
4 Zenith mirror
5 Eyepiece
6 Finderscope holder
7 Finderscope
8 Telescope (Telescope tube)
9 Lens hood
10 Objective lens
11 Locking screw| 12 Screw for the vertical fine adjustment mechanism
13 Yoke
14 Azimuth Safety
15 Tripod head
16 Accessories caddy
17 Tripod leg
18 Wing screw
19 Screw
20 Eyepiece extender
21 Compass
22 Moon filter
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Assembly

First, you assemble the tripod. For this, you‘ll need the following parts:

Fix the tripod to the tripod head with the help of the wing screw, washers and wing nuts.

Attach the middle span to the tripod spans with the small screws. – Important! The golden circle on the middle span must be pointing upwards.
Finally, screw the accessory plate onto the middle span.

Now, you turn to the telescope tube and find the following pieces:

First, you need to fix connect the finderscope to the finderscope holder (insert and tighten with three screws).

You will notice three threads protruding from the telescope tube. Here, you can attach the holder with the finderscope.

Next, screw the vertical fine adjustment to the protruding silver metal supports on the telescope tube.

Now it’s going to get difficult! It is best if you let someone help you. You need to attach the telescope tube to the tripod. To do so, take the spiral screw with the washers and screw the tube to the tripod head.

Attach the locking screw for the vertical fine adjustment to the tripod head yoke.

Now, mount the zenith mirror on to the focus tube.

If you want to use the eyepiece extender, attach it to the zenith mirror.

Finally, select one of the three eyepieces and fix it to the zenith mirror (or on the eyepiece extender).

Azimuthal mounting

Azimuthal mounting just means that you can move your telescope up and down, left and right, without having to adjust the tripod.
With the help of the azimuth safety and the screws for the vertical fine adjustment, you can lock your telescope in order to fix on an object (have this object right in your field of vision).
With the help of the vertical fine adjustment, you can move the telescope slowly up and down. And after you release the azimuth safety, you can move it right and left.

Before looking through your telescope for the first time

Before you look at something for the first time, you must coordinate the finderscope and the telescope lens. You have to position the finderscope in such a way that you see the same thing through it as you do through the eyepiece of the telescope. This is the only way you can use your finderscope to hone in roughly on objects before you observe these objects magnified through the telescope eyepiece.

Coordinating the finderscope and the telescope

Look through the telescope eyepiece and hone in on a far away object that you can see well (for instance, a church tower). Focus in on the object with the focus knob in the way shown in figure 11.
Important: The object must be located in the middle of your field of vision when you look through the telescope eyepiece.
Tip: If you loosen the locating screws for the vertical fine adjustment and the vertical axis, you will be able to move the telescope to the right and left, up and down. When you have the object well placed in your field of vision, you can retighten the locating screws and fix the position of the telescope.

Look through the telescope eyepiece and hone in on a far away object that you can see well (for instance, a church tower). Focus in on the object with the focus knob in the way shown in figure 11.
Important: The object must be located in the middle of your field of vision when you look through the telescope eyepiece.
Tip: If you loosen the locating screws for the vertical fine adjustment and the vertical axis, you will be able to move the telescope to the right and left, up and down. When you have the object well placed in your field of vision, you can retighten the locating screws and fix the position of the telescope.
Next, look through the finderscope. You will see the image of the object you honed in on in the crosshairs. The image will be upside down.
Note: The image you see through the finderscope is upside down because the lenses are inverting it. This is completely normal, and not an error.

Which eyepiece is right?

First of all, it is important that you always choose an eyepiece with the highest focal width for the beginning of your observation. Afterwards, you can gradually move to eyepieces with smaller focal widths. The focal width is indicated in millimeters, and is written on each eyepiece. In general, the following is true: The larger the focal width of an eyepiece, the smaller the magnification! There is a simple formula for calculating the magnification:
Focal width of the telescope tube : Focal width of the eyepiece = magnification
You see: The magnification is also depends on the focal width of the telescope tube. This telescope contains a telescope tube with focal width of 700 mm. From this formula, we see that if you use an eyepiece with a focal width of 20 mm, you will get the following magnification: 700 mm / 20 mm = 35 x magnification

To make things simpler, I’ve put together a table with some magnifications:

Telescope tube focal width| Focal width of eyepiece| Magnification| with 1.5x inverting lens
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700 mm| 24 mm| 29x| 43,5x
700 mm| 20 mm| 35x| 52,5x
700 mm| 12,5 mm| 56x| 84x
700 mm| 6 mm| 116x| 174x
700 mm| 4 mm| 175x| 262,5x

Use of the moon filter

If the image of the moon is too bright for you, you can screw the green moon filter into the bottom of the thread of the eyepiece. Then you can set the eyepiece normally into the zenith mirror.
The image that you see by looking through the eyepiece is now greenish. The moon appears less bright, and so observation is more pleasant.

Technical data:

Design: achromatic refractor
Focal width: 700 mm
Objective lens diameter: 60 mm
Viewfinder: 5×24
Mounting: azimuthal with tripod

Possible objects for observation:

We have compiled and explained a number of very interesting celestial bodies and star clusters for you. On the accompanying images at the end of the instruction manual, you can see how objects will appear in good viewing conditions through your telescope using the eyepieces that came with it.

The Moon

The moon is the Earth’s only natural satellite.
Figure 13)
Diameter: 3.476 km
Distance: approx. 384 401 km

The moon has been known to humans since prehistoric times. It is the second brightest object in the sky (after the sun). Because the moon circles the Earth once per month, the angle between the Earth, the moon and the sun is constantly changing; one sees this change in the phases of the moon. The time between two consecutive new moon phases is about 29.5 days (709 hours).

Orion Nebula (M 42)
M 42 in the Orion constellation (Figure 14)
Right ascension: 05:32.9 (Hours: Minutes)
Declination: -05:25 (Degrees: Minutes)
Distance: 1.500 light years

With a distance of about 1500 light years, the Orion Nebula (Messier 42, abbreviation: M 42) is the brightest diffuse nebula in the sky – visible with the naked eye, and a rewarding object for telescopes in all sizes, from the smallest field glass to the largest earthbound observatories and the Hubble Space Telescope.
When talking about Orion, we‘re actually referring to the main part of a much larger cloud of hydrogen gas and dust, which spreads out with over 10 degrees over the half of the Orion constellation. The expanse of this enormous cloud stretches several hundred light years.

Ring Nebula in Lyra constellation (M 57)
M 57 in the Lyra constellation (Figure 15)
Right ascension: 18:51.7 (Hours: Minutes)
Declination: -+32:58 (Degrees: Minutes)
Distance: 2.000 light years

The famous Ring Nebula M 57 in the constellation of Lyra is often viewed as the prototype of a planetary nebula; it is one of the magnificent features of the Northern Hemisphere’s summer sky. Recent studies have shown that it is probably comprised of a ring (torus) of brightly shining material that surrounds the central star (only visible with larger telescopes), and not of a gas structure in the form of a sphere or an ellipsis.

If you were to look at the Ring Nebula from the side, it would look like the Dumbbell Nebula (M27). With this object, we’re looking directly at the pole of the nebula.

Dumbbell Nebula in the Vulpecula (Fox) constellation (M 27)

M 27 in the Fox constellation (Figure 16)
Right ascension: 19:59.6 (Hours: Minutes)
Declination: -+22:43 (Angle: Minutes)
Distance: 1.250 light years

The Dumbbell Nebula (M 27) in Fox was the first planetary nebula ever discovered. On July 12, 1764, Charles Messier discovered this new and fascinating class of objects. We see this object almost directly from its equatorial plane.
If you could see the Dumbbell Nebula from one of the poles, it would probably reveal the shape of a ring, and we would see something very similar to what we know from the Ring Nebula (M 57). In reasonably good weather, we can see this object well even with small magnifications.

EC Declaration of Conformity
Bresser GmbH has issued a “Declaration of Conformity” in accordance with applicable guidelines and corresponding standards.
The full text of the EU declaration of conformity is available at the following internet address:
www.bresser.de/download/8843100/CE/8843100_CE.pdf

UKCA Declaration of Conformity
Bresser GmbH has issued a „Declaration of Conformity“ in accordance with applicable guidelines and corresponding standards.
The full text of the UKCA declaration of conformity is available at the following internet address:
www.bresser.de/download/8843100/UKCA/8843100_UKCA.pdf

Bresser UK Ltd. • Suite 3G, Eden House, Enterprise Way, Edenbridge, Kent TN8 6HF, GB

Warranty & Service

The regular warranty period is 2 years and begins on the day of purchase. To benefit from an extended voluntary warranty period as stated on the gift box, registration on our website is required. You can consult the full warranty terms as well as information on extending the warranty period and details of our services at www.bresser.de/warranty_terms.

Contact

Bresser GmbH
Gutenbergstraße 2
46414 Rhede · Germany
www.bresser.de
@BresserEurope| Bresser UK Ltd.
Suite 3G, Eden House
Enterprise Way, Edenbridge,
Kent TN8 6HF, Great Britain
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Irrtümer und technische Änderungen vorbehalten. · Errors and technical changes reserved.
Manual_8843100_Telescope-60-700_de-en-fr-nl-it-es-pt_BRESSER_v112022a