Optical tube
This is the main optical component of the telescope.
The glass lens at the front of the tube gathers incoming
light and focuses it by bending (or refracting) the light
rays. The tube assembly has several parts built into it,
which are shown and discussed in detail in the next
section.
90° Mirror star diagonal
The diagonal contains a mirror that reflects the light
gathered through the optical tube to the eyepiece. The
diagonal is angled to allow you to view objects that are
high in the sky from a comfortable position.
25mm Kellner eyepiece
The eyepiece is the part of the telescope that you actu-
ally look through to see things. The focal length of the
eyepiece and the telescope determines the magnifying
power of the telescope. Magnification is discussed in
more detail in the Using Your Telescope section.
EZ Finder II
TM
reflex sight
This is a special “finder” that helps you aim the tele-
scope and locate objects in the sky for close-up
viewing with your telescope. The EZ Finder II gener-
ates a red LED “dot” that shows where your telescope
is aimed. The use of the EZ Finder II is discussed in the
Getting Started section.
“Yoke” altazimuth mount
The mount couples the telescope to the tripod and
allows you to move the optical tube easily both up-and-
down and right-and-left.
Tripod legs
These aluminum tripod legs support the telescope and
keep it steady. They can extend from 27" to 50" long.
Accessory tray
This tray is a convenient place for holding extra eye-
pieces and other small pieces of equipment.
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6
5
4
3
2
1
5
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3. The Basic Components of Your Telescope
Figure 1 shows the fully assembled Observer 60 . All the major components of the telescope are described and numbered to help
you identify each part and understand its use. Refer back to this figure when assembling the telescope.
