Orion 9768 Instruction Manual

clear-aperture reflector
Dovetail mount
Secondary mirror
holder
Congratulations on your purchase of an Orion telescope. Your new 3.6" Clear-Aperture (CA) reflector is
specifically designed for high-resolution visual observation of astronomical objects. With its unobstructed
optical system, you'll be able to enjoy razor sharp views of objects such as planets, the Moon, double
stars, and hundreds of other fascinating celestial denizens.
about the clear-aperture newtonian
optical Design
The clear-aperture Newtonian is an exciting optical design that
has gained popularity in recent years. Because of its unob-
structed primary mirror, it provides much higher image contrast
than obstructed optical designs, such as standard Newtonians
and Schmidt-Cassegrains. The secondary mirrors in those
types of telescopes block a significant portion of the incoming
light, which only serves to reduce image contrast.
In addition, since the incoming light does not pass through any
lenses, there is no chromatic aberration (color dispersion) in
clear-aperture Newtonians, as is present in refractors. In fact,
side-by-side testing shows clear-aperture Newtonians can
out perform apochromatic refractors of similar aperture that
cost over twice as much! This is because the clear-aperture
Newtonian has absolutely no chromatic aberration to speak of.
Even the most expensive apochromatic refractors have some
residual chromatic aberration, which reduces image contrast.
instruction Manual
orion
Optical Tube Assembly
#9768
Focuser
Focus knobs
Figure 1.
The 3.6" Clear-Aperture reflector optical tube assembly.
3.6"
®
As a result, the SkyView Pro 3.6 CA EQ yields incredibly high-
contrast images. Expect to see amazingly crisp views of the
planets, Moon, Sun (with optional solar filter, of course!), dou-
ble stars, and bright star clusters.
Warning: Never look directly at the Sun
through your telescope or its finder scope—even
for an instant—without a professionally made
solar filter that completely covers the front of
the instrument, or permanent eye damage could
result. Young children should use this telescope
only with adult supervision.
Primary mirror cell
IN 242 REV A 10/04