Celestron 80GTL Telescope User Manual


 
9
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:
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1. Slide the Star Pointer bracket into the dovetail mounting platform on top of the focuser assembly (see figure 2-6).
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.
Star Pointer Operation
The star pointer is powered by a long life 3-volt lithium battery (#CR2032) located
underneath the front portion of the Star Pointer. Like all finderscopes, the Star Pointer must
be properly aligned with the main telescope before it can be used. This is a simple process
using the azimuth and altitude control knobs located on the side and bottom of the Star
Pointer. The alignment procedure is best done at night since the LED dot will be difficult to
see during the day. Note: Before using the StarPointer, you must first remove the
protective plastic cover over the battery (see figure 2-7).
1. To turn on the Star Pointer, rotate the variable brightness control (see figure 2-5)
clockwise until you here a "click". To increase the brightness level of the red dot,
continue rotating the control knob about 180º until it stops.
2. Locate a bright star or planet and center it in a low power eyepiece in the main telescope.
3. With both eyes open, look through the glass window at the alignment star.
If the Star Pointer is perfectly aligned, you will see the red LED dot overlap the alignment star. If the Star Pointer is not aligned, take
notice of where the red dot is relative to the bright star.
4. Without moving the main telescope, turn the Star Pointer's azimuth and altitude alignment controls (see figure 2-5)
until the red dot is directly over the alignment object.
If the LED dot is brighter than the alignment star, it may make it difficult to see the star. Turn the brightness control
counterclockwise, until the red dot is the same brightness as the alignment star. This will make it easier to get an accurate
alignment. The Star Pointer is now ready to be used.
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Azimuth
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Knob
Red
Alignment
Dot
Battery
Protective
Cover
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