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Celestron CGEM 800 Manual

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13
2. Point your telescope at the object you selected and center it in the main optics of the telescope.
3. Lock the azimuth and altitude clamps to hold the telescope in place.
4. Check the finder to see where the object is located in the field of view.
5. Adjust the thumb screws on the finder bracket, until the cross hairs are centered on the target.
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The 8, 9.25 and 11" lens cap utilizes a bayonet-type locking
mechanism to hold it in place. To remove the lens cap, hold the
cover firmly and rotate the outer edge 1/2” counterclockwise and
pull off.
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In order to properly balance your telescope, you will need to
move your telescope manually at various portions of the sky to
observe different objects. To make rough adjustments, loosen the
R.A. and DEC clutch knobs slightly and move the telescope in
the desired direction.
Both the R.A. and DEC axis have lock levers to clutch down each
axis of the telescope. To loosen the clutches on the telescope, rotate the lock levers counterclockwise.
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To eliminate undue stress on the mount, the telescope should be properly balanced around the polar axis. Proper balancing is
crucial for accurate tracking. To balance the mount:
1. Verify that the telescope is securely attached to the telescope mounting platform.
2. Loosen the R.A. lock lever and position the telescope off to one side of the mount. The counterweight bar will
extend horizontally on the opposite side of the mount.
3. Release the telescope — GRADUALLY — to see which way the telescope “rolls.”
4. Loosen the set screws on the side of the counterweight so it can be moved the length of the counterweight bar.
5. Move the counterweight to a point where it balances the telescope (i.e., the telescope remains stationary when the
R.A. clutch knobs are loose).
6. Tighten the screw on the counterweight to hold it in place.
While the above instructions describe a perfect balance arrangement, there should be a SLIGHT imbalance to ensure the best
possible tracking. When the scope is on the west side of the mount the counterweight should be slightly imbalanced to the
counterweight bar side. And when the tube is on the east side of the mount there should be a slight imbalance toward the
telescope side. This is done so that the worm gear is pushing against a slight load. The amount of the imbalance is very slight.
When taking astrophotographs, this balance process can be done for the specific area at which the telescope is pointing to
further optimize tracking accuracy.
Figure 2-13
Declination
Lock
Right Ascension
(RA) Lock
… 13 …


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