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The eyepiece (or ocular) is an optical element that magnifies the image focused by the telescope. Without the eyepiece it
would be impossible to use the telescope visually. Eyepieces are commonly referred to by focal length and barrel
diameter. The longer focal length (i.e., the larger the number) the lower the eyepiece magnification (i.e., power).
Generally, you will use low-to-moderate power when viewing. For more information on how to determine power, see the
section on “Calculating Magnification”. The eyepiece fits directly into the focuser of the Newtonian. To attach the
eyepieces:
1.
Make sure the thumbscrews are not protruding into the focuser tube. Then, insert the chrome barrel of the eyepiece
into the focus tube (remove
the plug up cap of the focuser first) and tighten the thumbscrews – see Figure 2-11.
2.
The eyepieces can be changed by reversing the procedure as described above.
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Your telescope comes with a 3x Barlow Lens which triples the magnifying power of each eyepiece. However, the
greatly magnified images should only be used under ideal conditions – see the Calculating Magnification section of
this manual.
Insert the Barlow lens directly into the focuser. Then, insert an eyepiece into the Barlow lens.
Note
: Start by using a low power eyepiece as it will be easier to focus.
Figure 2-12
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The Star Pointer is the quickest and easiest way to point your telescope exactly at a desired object in the sky. It's like having a laser pointer that you can shine directly
onto the night sky. The Star Pointer is a zero magnification pointing tool that uses a coated glass window to superimpose the image of a small red dot onto the night
sky. While keeping both eyes open when looking through the Star Pointer, simply move your telescope until the red dot, seen through the Star Pointer, merges with the
object as seen with your unaided eye. The red dot is produced by a light-emitting diode (LED); it is not a laser beam and will not damage the glass window or your eye.
The Star Pointer comes equipped with a variable brightness control, two axes alignment control and mounting brackets. Before the Star Pointer is ready to be used, it
must be attached to the telescope tube and properly aligned:
1.
Slide the Star Pointer bracket into the dovetail mounting platform on top of the optical tube assembly.
2.
Orient the Star Pointer so that the sight tube is facing towards the front of the tube.
3.
Secure the Star Pointer bracket by tightening the thumb screw on the mounting platform.
Figure 2-13 – The Star Pointer Finderscope with Bracket (Dovetail Mount itself can be facing towards or away from the sight tube)
Dovetail Tightening
Screw
Azimuth Adjustment
Control
ON/OFF
Brightness Control
Sight Tube
Dovetail Mount
Battery Compartment
(not shown)
Altitude Adjustment
Control
Figure 2-11
