Celestron CGEM - 925 Computerized Telescope CGEM Series Manual - Page 12

WARNING, Aligning the Finderscope,

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3. Place the mounting bracket over the two holes of the rear cell as shown in the figure 2-10. 4. Insert the screws through the bracket and into the rear cell. Figure 2-10 WARNING: If you remove the mounting bracket, do not completely thread the screws back into the rear cell of the telescope. The screws may be long enough to obstruct the movement of, and possibly damage the primary mirror. Alignment Screws With the bracket firmly attached to the telescope, you are ready to attach the finder to the bracket. 1. Slide the O-Ring over the back of the finderscope and position it on the tube toward the objective end of the finderscope. Pivot Screw Quick release Screws 2. Slide the eyepiece end of the finderscope into the front ring of the bracket (the front ring is the one without the adjustment screws), then through the back ring. It may be necessary to push down the spring loaded pivot screw so that the finder will pass through the back ring (see figure 2-11) Figure 2-11 3. Push the finder back until the O-Ring is snug inside the front ring of the finder bracket. 4. Hand tighten the two alignment thumb screws until they make contact with the finderscope. Figure 2-12 The finderscope bracket comes in two pieces; the mounting bracket (left) and the finder bracket (right) Aligning the Finderscope The finderscope is adjusted using two adjustment screws, located on the top and on the right (when looking though the finder) of the finder bracket and a spring loaded pivot screw (located on the left side of the bracket). This allows you to turn the top adjustment screw to move the finderscope up and down, and turn the right adjustment screw to move the finderscope right to left. The spring loaded pivot screw puts constant pressure on the finder so that the adjustment screws are always making contact with the finder. To make the alignment process a little easier, you should perform this task in the daytime when it is easier to locate objects in the telescope without the finder. To align the finder: 1. Choose a conspicuous object that is in excess of one mile away. This will eliminate any possible parallax effect between the telescope and the finder. 12

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12
3.
Place the mounting bracket over the two holes of the rear cell as shown in the figure 2-10.
4.
Insert the screws through the bracket and into the rear cell.
WARNING
:
If you remove the mounting bracket, do not completely thread the screws back into the rear cell of the telescope.
The screws may be long enough to obstruct the movement of, and possibly damage the primary mirror.
With the bracket firmly attached to the telescope, you are
ready to attach the finder to the bracket.
1.
Slide the O-Ring over the back of the finderscope
and position it on the tube toward the objective
end of the finderscope.
2.
Slide the eyepiece end of the finderscope into the
front ring of the bracket (the front ring is the one
without the adjustment screws), then through the
back ring. It may be necessary to push down the
spring loaded pivot screw so that the finder will
pass through the back ring (see figure 2-11)
3.
Push the finder back until the O-Ring is snug inside the front ring of the finder bracket.
4.
Hand tighten the two alignment thumb screws until they make contact with the finderscope.
Aligning the Finderscope
The finderscope is adjusted using two adjustment screws, located on the top and on the right (when looking though the finder)
of the finder bracket and a spring loaded pivot screw (located on the left side of the bracket). This allows you to turn the top
adjustment screw to move the finderscope up and down, and turn the right adjustment screw to move the finderscope right to
left.
The spring loaded pivot screw puts constant pressure on the finder so that the adjustment screws are always making
contact with the finder.
To make the alignment process a little easier, you should perform this task in the daytime when it is easier to locate objects in
the telescope without the finder.
To align the finder:
1.
Choose a conspicuous object that is in excess of one mile away.
This will eliminate any possible parallax effect
between the telescope and the finder.
Figure 2-12
The finderscope bracket comes in two pieces; the mounting bracket (left) and the finder bracket (right)
Figure 2-10
Alignment Screws
Pivot
Screw
Quick release
Screws
Figure 2-11