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The
Omegon® Maksutov Telescope 90/1250 OTA
Congratulations on the purchase of the new Omegon® Telescope Maksutov 90/1250 OTA. This
telescope tube is suited for both terrestrial and astronomical use. It is compact and easy to carry
around; it can also be used as a tele-objective or a high-power telescope. You can even use it to take
photos with a DSLR camera (not included).
1. Included parts.
Besides the telescope tube we have included a finderscope, a finderscope
bracket and a soft carry case.
2. Getting started.
It is very simple to get started. Here is how the telescope works. The telescope
aperture (lens) should be pointing to the object being observed. The light comes through the
aperture lens, to the mirror on the back and is then reflected to the small secondary mirror on the
telescope lens. There it is reflected again and so brought to the eyepiece. The eyepiece can be used
in two positions – top (#5) or back (#6) – see below.
At the focuser one can use accessories.
Different accessory combinations give different results, such as different image magnifications. All
this will be explained in detail on the next pages.
2.1. Knowing your telescope.
1- Optical Tube;
7- Finderscope adjustment screw;
2- Dovetail adapter for telescope mount or tripod; 8- Focusing knob;
3- Finderscope adjustment screw;
9- Flip-Mirror System;
4- Finderscope;
10- DSLR Camera (not included);
5- Top eyepiece holder;
11- T-ring adapter (not included);
6- Back eyepiece holder;
12- Eyepiece (not included).
3. Assembly.
Remove the telescope from the shipping box. Start by installing the finderscope tube
and finderscope bracket as shown in figure 1. Make sure it is pointing to the telescope’s aperture,
tighten it using the side finderscope thumbscrew (on the finderscope shoe base). You will need to
use a photographic tripod or a telescope mount (Vixen/Synta compatible dovetail) to mount the
tube (figure 2). Make sure you choose a stable tripod or mount for ease of use. The telescope’s
aperture should point to the object being observed. Choose a low magnification eyepiece (#12),
insert it into the top eyepiece holder (#5), and make sure to securely tighten the eyepiece using the
eyepiece holder thumbscrew. You may also use the eyepiece on the back eyepiece holder (#6). Use
the focusing knob (#8) to get a sharp (focused) image. The back eyepiece holder (#6) provides a
straight view for a DSLR camera. To use a DSLR camera with the telescope start by removing the
