Celestron 21045 Instruction Manual - Page 6
Browse online or download pdf Instruction Manual for Telescope Celestron 21045. Celestron 21045 10 pages. Powerseeker series
Also for Celestron 21045: Quick Setup Manual (2 pages), Specifications (4 pages), Brochure & Specs (4 pages), Specifications (2 pages), Quick Setup Manual (2 pages), Quick Setup Manual (2 pages)
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1.
Locate a distant daytime object and center it in a low power eyepiece in the main telescope.
2.
Look through the finderscope and take notice of the position of the same object.
3.
Without moving the main telescope, turn the adjustment thumb screws located around the finderscope
bracket until the crosshairs of the finder are centered on the alignment object.
In order to use the equatorial mount's setting circles, the mount must first be aligned with the earth's axis of rotation.
1.
Turn the latitude adjustment screw (8) located at the rear of the mount to adjust the angle of the mount.
Look at the latitude scale and move the mount to the latitude of your location. This only has to be done
once unless you take the telescope to a different location. For example, Los Angeles, California is located
at about 34º. If you do not know your latitude, it can be
found on most road atlases of your area.
To change the direction your telescope is pointing:
2.
To move the telescope in declination (north/south) there
are two options. For large and quick movements, loosen the
declination locking screw (20) and manually move the
telescope, then tighten the knob when you are near the
position you want. For very small movements and fine
adjustments, use the declination slow motion control (7).
The declination cable has a range of about 30°. Do not try
to force movement when the declination cable has
reached the stop.
3.
To move the telescope in right ascension (east/west) there are two options. For large and quick movements,
loosen the right ascension locking screw (located above the setting circle) and manually move the telescope,
then tighten the screw when you are near the position you want. For very small movements and fine
adjustments, use the right ascension slow motion control (17).
The telescope should be properly balanced in order for it to move smoothly in both axes. Proper balance is essential
if using an optional motor drive for accurate tracking.
4.
To balance the right ascension axis, move the counterweight bar so it is parallel (horizontal) to the ground.
Slowly release the right ascension locking screw and see if the optical tube moves. If the optical tube
moves, then slide the counterweight up or down the counterweight bar until the optical tube remains
stationary in the parallel position to the ground. When this happens, make sure the counterweight lock
(located on the tip of the counterweight bar) is tight.
1.
Once you have found an object in the telescope, turn the focusing knob (21) until the image is sharp.
2.
To focus on an object that is nearer than your current target, turn the focusing knob toward the eyepiece
(i.e., so that the focusing tube moves away from the front of the telescope). For more distant objects, turn
the focusing knob in the opposite direction.
3.
To achieve a truly sharp focus, never look through glass windows or across objects that produce heat waves,
such as asphalt parking lots.
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Declination
Setting Circle
Right Ascension
Setting Circle
Latitude
Scale
Figure 1-5