Manual Bresser 9140400 National Geographic 40-400 (page 8 of 36) (English, German, Dutch, French, Italian, Polish, Spanish)

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General Warnings

• Risk of blindness — 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.

• Choking hazard — Children should only use the device under adult supervision. Keep packaging mate-

rial, like plastic bags and rubber bands, out of the reach of children, as these materials pose a choking

hazard.

• Risk of re — Do not place the device, particularly the lenses, in direct sunlight. The concentration of light

could cause a re.

• Do not disassemble the device. In the event of a defect, please contact your dealer. The dealer will con-

tact the Service Centre and can send the device in to be repaired, if necessary.

• Do not expose the device to high temperatures.

• The device is intended only for private use. Please heed the privacy of other people. Do not use this

device to look into apartments, for example.

Parts overview

1. Focus wheel

2. Zenith mirror (diagonal)

3. Eyepieces (12.5 mm, 20 mm)

4. Telescope (Telescope tube)

5. Tube opening

6. Objective lens

7. Locating screw for the vertical ne adjustment

(for moving upward and downward)

8. Locating screw for the vertical axis

(for turning to the right and left)

9. Tripod legs

10. Compass

Assembly

You should take some time to decide where you would like to set up your telescope. Choose a stable sur-

face like a table. Snap the telescope tube into the U-shaped clamp on the top of the tripod head. You can

now place the zenith mirror (2) into the eyepiece holder and secure it with the small screw on the connector

(Fig. 1). Next, set the eyepiece (3) into the opening of the zenith mirror (2) (Fig. 1). Here too, there is a screw

with which you can screw the eyepiece onto the zenith mirror.

Note: First, put the eyepiece with the largest focal length (e.g. 20 mm) onto the zenith mirror. While you'll

get the lowest amount of magnication, it will be easier for you to view things.

Using your telescope

To move the scope up, down and side to side, grip the telescope and steadily move the tube until your target

comes into view in the eyepiece. It is important to remember that the rotation of the Earth means objects

will move out of your eyepiece fairly quickly. Once you have found and focused on your desired target, you

will have to track the object as it journeys across the night sky. For a closer look at an object, you can insert

the 12.5mm eyepiece. The magnication will increase from 20x to 32x.

Which eyepiece is right?

It is important that you always choose an eyepiece with the highest focal width at the beginning of your

observation. Afterward, you can gradually move to eyepieces with smaller focal widths. The focal width

is indicated in millimetres and is written on each eyepiece. In general, the following is true: the larger the

focal width of an eyepiece, the smaller the magnication. There is a simple formula for calculating the

magnication:

Focal width of the telescope tube : Focal width of the eyepiece = Magnication

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Bresser 9140400 National Geographic 40-400 Manual

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