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Celestron CGX-L EQUATORIAL Manual

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8 | ENGLISH
4. Using the direction keys, center the star in the eyepiece of
your telescope and press ALIGN.
5. Select a second star from the list and repeat the process
from steps 2-4. When prompted to add a Calibration Star,
you can either press BACK to complete the alignment, or
for best results, proceed to add a calibration star.
For best results, add at least one Calibration Star. This
will improve the pointing accuracy of your mount.
6. When prompted to “Add Calibration Star”, choose a star
from the list and press ENTER. The mount will slew to the
other side of the meridian to add a calibration star.
7. Center the star in the viewfinder and press ENTER, then
center the star in your eyepiece and press ALIGN.
8. When prompted to add another calibration star, you may
continue to add more, or press BACK to complete the
alignment.
Selecting Objects
Select from the object database categorized by Solar
System, Stars, or Deep Sky. Within these menus (on
keypad numbers 1, 2, and 3), you can select by object
name or popular catalog number (such as M42 for
Messier 42).
Keypad 6 and 9 (up and down) allows you to scroll
through any list in the hand control. Press ENTER to go
to the selected object the list.
Example of selecting and slewing to Messier M42 deep
sky object:
• Press DEEP SKY then ENTER
• Scroll down (keypad 9) to Messier and press ENTER
• Press “0-4-2” on the keypad and press ENTER
The SkyTour (keypad 5) is a great way to explore the sky
without consulting a star chart. The Tour function will
generate a list of the most interesting objects to observe
for your time and location.
Figure 8 Polar alignment adjustment
Attach the Hand Control Holster
Wrap the hook & loop strap and holster around the tripod
leg and place the hand control in the holster.
Plug in the Hand Control
Plug the supplied NexStar+ hand control into one of the
Aux ports.
Warning: Do not plug the hand control into the
Autoguide Port. Damage to the mount or hand control
could occur. Similarly, do not plug an autoguider cable
into the Aux port or damage could occur.
Home Position
The mount is in the “home” position when the counterweight
shaft is pointing downward, and the telescope is pointing
along the polar axis of the mount as pictured in (Figure 7).
The mount’s internal switches will take the mount to its
home position when you power it on (more on that in
“Basic Usage”), but you can still manually position it before
powering on the mount. Simply unlock the two lock levers,
and move the telescope to the desired position.
Polar Align the Mount
The computerized go-to is capable of locating objects
even if the mount is not perfectly polar aligned. However,
polar alignment is necessary to achieve the best
tracking accuracy of your mount, and it’s essential to
astrophotography. When polar aligned, an Equatorial mount
tracks the sky in one motion, keeping the object centered in
the eyepiece or camera.
CGX-L’s polar alignment system consists of an altitude
adjuster and azimuth adjuster (Figure 8).
An optional polar alignment scope is available from Celestron
and attaches to the mount. The optional polar axis scope
does not pass through the R.A. axis because that area is used
for internal cabling. If you are not using the optional polar
alignment scope, you can achieve a rough polar alignment
by sighting through the viewfinder of your telescope, and
adjusting the mount until you center Polaris in the eyepiece
of your telescope. This will get you to within about three-
quarters of a degree within the North Celestial Pole (NCP).
Basic Usage
With your mount assembled and polar aligned, proceed to
startup the mount:
Powering the Mount
The CGX-L mount can be powered by the supplied car
battery adapter to a 12VDC battery source that can deliver
at least 3 amperes of current. Or you may use an optional
AC adapter that delivers at least 3 amperes of current.
AC power adapters with threaded barrel connectors are
available from Celestron.
Figure 7 Telescope in the home position
Altitude
Adjustment Knobs
Altitude
Lock Knobs
Azimuth
Adjustment Knobs
… 8 …


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