10
E.
ABOUT YOUR NEWTONIAN REFLECTOR TELESCOPE:
Your telescope is a Newtonian reflector. Light enters the open end of the tube and
travels down to the opposite end where it strikes a specially curved mirror, known as the
primary mirror. The focused image is reflected back up the tube to a small, flat mirror
near the open tube end, called the secondary mirror. This secondary mirror reflects the
focused image out through the side of the telescope tube to the eyepiece holder where
it is enlarged for viewing through the eyepiece.
The primary mirror is a precision ground and polished component
that is precisely positioned at one end of the optical tube. It is pre-
aligned for maximum performance at the factory and should not
need any adjustment.
Therefore, never adjust or remove any of
the screws located at this end of the optical tube. Doing so will
void your warranty and affect or damage the performance of
your telescope (See Fig. 11).
(Fig. 11)
F. USING YOUR TELESCOPE:
1) It is recommended to use your telescope outside or at times through open windows.
Your view can be distorted by reflections in the glass of a closed window or at times
by air currents of differing temperatures passing through an open window.
2) Let your telescope adjust to the outside temperature. Your telescope will perform
much better if the temperature of the mirrors, eyepiece lenses, and the air inside the
tube are the same as the outside temperature. It may take up to 30 minutes to
equalize the temperatures when the difference in temperatures is extreme.
3) Find a location far from glaring light. If you live in an urban area, your viewing will
probably improve the farther you move away from the city’s lights. The sky glow of a
town or city can dramatically reduce the telescope’s performance and viewing
capabilities.
