Omegon 80/400 OTA Manuel utilisateur

Reproduction of part or all of the contents of this document in any form is expressly prohibited other than for individual use only. All text, images and labels are property of Nimax Gmbh.

Instruction Manual

Omegon® 80/400 OTA (Optical Tube)

English version 1.2015 Rev A

Reproduction of part or all of the contents of this document in any form is expressly prohibited other than for individual use only. All text, images and labels are property of Nimax Gmbh.

The Omegon® 80/400 OTA

Congratulations on the purchase of the new Omegon® 80/400. This telescope will give you hours of

fun, with its all optical glass lens and light gathering capability, it is the ideal companion to start in

the world of amateur astronomy. With this telescope you will be able to see the craters on the Moon,

star clusters, some nebulae, the Jupiter disc features and its Galilean moons and the rings of Saturn.

1. Included parts. Besides the telescope tube we have included a pair of tube rings (#15), and a

tripod base (#14) –see below;

1.1. Knowing your telescope.

1- Dew Shield/Aperture; 8- Eyepiece thumbscrew (2x);

2- Camera thread counter-nut; 9- Eyepiece tube;

3- Camera thread ¼”-20; 10- T-Thread for camera connection;

4- Locking nut; 11- Focuser tube;

5- Finderscope locking thumbscrew; 12- Focuser adjustment wheel;

6- Finderscope base; 13- Optical ring fixing screw and nuts;

7- Focuser break thumbscrew; 14- Tripod base (threaded ¼”-20);

15- Tube ring.

2. Getting Started.

It is very simple to get started. Here is how the telescope works. The telescope aperture (#1) should

point to the object being observed. The light comes through the aperture lens into the back and to

the eyepiece tube (#9). It is then brought to the eyepiece. To observe just look through the eyepiece.

At the focuser one can use the supplied accessories. Different accessory combinations give different

results, such as different image magnifications or correct images, for example. All this will be

explained in detail on the next pages.

Figure 1. Part description.

Reproduction of part or all of the contents of this document in any form is expressly prohibited other than for individual use only. All text, images and labels are property of Nimax Gmbh.

2.1. The telescope is compatible with 1.25”

accessories. For visual use we recommend

using a 1.25”diagonal/prism and an eyepiece

(not included).

It is also helpful to use a finderscope. We

recommend a red-dot finderscope (not

included) as they are simple and easy to use.

To find out about different magnifications just

divide the telescope’s focal length by the

eyepiece’s focal length. A 25mm eyepiece will

provide a magnification of 16x (400mm

divided by 25mm= 16x);

2.2. The tripod base (#14 –Figure 1) has 3 ¼”-

20 threaded female nuts. These are

compatible with standard tripod fittings. This

means you can use the telescope with a

photographic tripod, which is especially

interesting for terrestrial view (bird-watching

or long distance terrestrial observation).

2.3. The camera thread ¼”-20 (#3 –Figure 1)

allows you to use a piggy-backed camera

(DSLR or compact). Piggy-back

astrophotography is a very simple and

effective way to make spectacular wide-field

photography.

Reproduction of part or all of the contents of this document in any form is expressly prohibited other than for individual use only. All text, images and labels are property of Nimax Gmbh.

2.4. The telescope can also be used on a

telescope mount (German equatorial mount –

not included) for deep-sky long exposure

photography, or for astronomy observations.

It also provides a very solid and stable

platform for visual observation. We

recommend using a motorized German

equatorial, such as the Omegon® EQ-300

mount and Omegon® DUO drive system to

easily start in the world of astrophotography.

2.5. The focuser is threaded to accept T-

thread accessories (#10 –Figure 1) such as a

camera T-ring (#1 –Figure 6). This way you can

use the telescope as a powerful tele-objective

with a DSLR camera (#2 –Figure 6). Manual

focus is required as the camera’s auto-focus

will not be available.

3. Accessories (not included). For visual observation a telescope 1.25” eyepiece is required. For easy

use we suggest using a 1.25” diagonal/prism mirror (Figure 2). A finderscope is a highly

recommended and necessary item to point the telescope at an object.

Questions? Visit our website www.astroshop.eu and drop us a line* nimax Gmbh Otto-Lilienthal-Str. 9 D-86899 Landsberg am Lech

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