7
8
Objective lens:
This is the main optical component of the telescope. It is
an achromatic, fully coated 60mm lens.
9
Glare/Dew shield:
This is a simple “hood” for the objective lens that prevents
dew from forming and stray light from hitting the lens.
10
Altitude castings:
These castings are built into the optical tube. The “yoke”
knobs thread into these castings through the holes in
the top of the “yoke” altazimuth mount to secure the two
parts together.
11
EZ Finder II mounting bracket:
The EZ Finder II is secured to this bracket located on the
optical tube.
12
Micro-motion rod attachment post:
This post is where the micro-motion rod will be attached to
the optical tube.
13
Altitude micro-motion control rod and thumb-
wheel:
This allows fine adjustment of the telescope in the
altitude (up-down) direction. For more details, see the
Getting Started section.
14
Focuser drawtube:
This is where the 90° mirror star diagonal, or other optional
diagonal, is inserted. The drawtube is adjusted by the
turning the focus wheel, which adjusts a rack-and-pin-
ion system to bring objects into focus.
15
Focus wheels:
These wheels, when turned, move the focuser drawtube
in or out. Use it to bring things into focus when you are
looking in the eyepiece.
16
Diagonal holder thumbscrews:
These two thumbscrews secure the 90° mirror star diag-
onal into the focuser drawtube. These should only be
loosened to remove or rotate the star diagonal.
17
Eyepiece holder thumbscrew:
This thumbscrew holds the eyepiece in position. Tighten
it after inserting an eyepiece; loosen it before removing
or changing eyepieces.
18
“Yoke” knobs:
These knobs secure the optical tube to the “yoke” alt-
azimuth mount. They should always be securely
tightened.
Details of the Optical Tube and Components
Figure 2a shows the details of the optical tube and its various parts. The optical tube is shown attached to the mount for clarity.
Figure 2b is a close-up of the focuser with even more detail.
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