The Omegon® AC 70/400 BackPack AZ
Congratulations on the purchase of the new Omegon® AC 70/400 BackPack AZ. This telescope will
give you hours of fun, with its optical glass lens and light gathering capability it is the ideal
companion to start in the world of terrestrial view and the night sky. With this telescope, you will be
able to see the craters on the Moon, Sun Spots (with the supplier Sun filter), the Galilean Moons and
the rings of Saturn.
Included parts.
a - Aluminium Tripod;
b- Optical tube;
c- 5x finderscope;
d- K20mm eyepiece 1.25”;
e - K10mmr eyepiece 1.25”
f - Prism 1.25”;
g - Sun filter;
h – Back pack (not shown)
1. Knowing your telescope.
1.1. The Optical Tube (b)
The optical tube is one of the two
main parts of the telescope. It has a
glass lens (objective) - (1) at one
end. The objective gathers light from objects. This telescope has a 70mm (2.7”) objective, this is the
lens diameter. On the opposite end of the objective there is the focuser (9). The focuser is a
mechanical system that extends a tube #5. It allows in combination with the prism (8) and one of the
two eyepieces K20mm (e) and K10mm (d) (included) to obtain a magnified image that can be
observed peeking through the eyepiece lens. The optical tube also carries a small telescope -
finderscope - (c) which is used to aim the optical tube to an object to be observed. A tripod is
required to point and a Sun filter can be used to observe the Sun.
1- Objective lens
2- Optical tube
3- Finderscope base
4- Brake (focuser)
5- Draw-tube
6- Eyepiece
7- Prism thumbscrew
8- Prism
9- Knob (focuser)
10- Dovetail
Figure 2. Optical Tube.
Figure 1. What’s included.
