7
Objective lens
This is the main optical component of the telescope.
It is an achromatic, coated 60mm lens.
Glare/Dew shield
This is a simple “hood” for the objective lens (13) that pre-
vents dew formation and stray light from hitting the lens.
Equatorial mount head
The top of the equatorial mount (5). This is where the
optical tube (1) will be attached to the mount.
EZ Finder II mounting bracket
The EZ Finder II (4) is secured to this bracket located
on the optical tube (1).
Focuser drawtube
This is where the 90° mirror star diagonal (2) is insert-
ed. The drawtube is adjusted by the turning the focus
wheel (18), which adjusts a rack-an-pinion system to
bring objects into focus.
Focus wheels
These wheelswhen turned, move the focuser drawtube
(17) in or out. Use it to bring things into focus when you
are looking in the eyepiece (3).
Diagonal holder thumbscrews
These two thumbscrews secure the 90° mirror star
diagonal (2) into the focuser drawtube (17). These
should only be loosened to remove or rotate the star
diagonal.
Eyepiece holder thumbscrew
This thumbscrew holds the eyepiece in position.
Tighten it after inserting an eyepiece (3); loosen it
before removing or changing eyepieces.
20
19
18
17
16
15
14
13
Details of the Optical Tube and Components
Figure 2a shows the details of the optical tube (1) 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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