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Celestron SkyProdigy 6 - 11076 Manual

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TELESCOPE MAINTENANCE
While your SkyProdigy telescope requires little maintenance,
there are a few things to remember that will ensure your telescope
performs at its best.
Care and Cleaning of the Optics
Occasionally, dust and/or moisture may build up on the lens of
your telescope. Special care should be taken when cleaning any
instrument so as not to damage the optics.
If dust has built up on the optics, remove it with a brush (made
of camel’s hair) or a can of pressurized air. Spray at an angle to
the lens for approximately two to four seconds. Then, use an
optical cleaning solution and white tissue paper to remove
any remaining debris. Apply the solution to the tissue and then
apply the tissue paper to the lens. Low pressure strokes should
go from the center of the corrector to the outer portion. Do NOT
rub in circles!
You can use a commercially made lens cleaner or mix your own.
A good cleaning solution is isopropyl alcohol mixed with distilled
water. The solution should be 60% isopropyl alcohol and 40%
distilled water. Or, liquid dish soap diluted with water (a couple
of drops per one quart of water) can be used.
To minimize the need to clean your telescope, replace all
lens covers once you have finished using it. This will prevent
contaminants from entering the optical tube.
Collimation (For SkyProdigy 6)
The optical performance of your SkyProdigy telescope is directly
related to its collimation, that is the alignment of its optical
system. Your SkyProdigy was collimated at the factory after it
was completely assembled. However, if the telescope is dropped
or jarred severely during transport, it may have to be collimated.
The SkyProdigy 102 has xed optical systems that should not
come out of collimation. The SkyProdigy 6, however has three
collimation screws that can be used to adjust the alignment of the
secondary mirror.
To check the collimation of your telescope you will need a light
source. A bright star near the zenith is ideal since there is a mini-
mal amount of atmospheric distortion. Make sure that tracking
is on so that you won’t have to manually track the star. Or, if you
do not want to power up your telescope, you can use Polaris. Its
position relative to the celestial pole means that it moves very
little thus eliminating the need to manually track it.
Before you begin the collimation process, be sure that your
telescope is in thermal equilibrium with the surroundings. Allow
45 minutes for the telescope to reach equilibrium if you move it
between large temperature extremes.
To verify collimation, view a star near the zenith. Use a medium
to high power ocular - 12mm to 6mm focal length. It is impor-
tant to center a star in the center of the eld to judge collima-
tion. Slowly cross in and out of focus and judge the symmetry
of the star. If you see a systematic skewing of the star to one
side, then recollimation is needed.
NOTE: Once your SkyProdigy 6 has been collimated, the
optics may no longer be aligned with the optical axis of the
camera resulting in unsuccessful alignments or poor pointing
accuracy. Therefore, it is recommended that you calibrate
the camera after collimation. For information on calibrating
the camera, see the Calibrate option under the StarSense
Camera section of the manual.
To accomplish this, you need to tighten the secondary collima-
tion screw(s) that move the star across the eld toward the
direction of the skewed light. These screws are located in the
secondary mirror holder (see gure 6-1). Make only small 1/6
to 1/8 adjustments to the collimation screws and re-center the
star by moving the scope before making any improvements or
before making further adjustments.
To make collimation a simple procedure, follow these easy steps:
1. While looking through a medium to high power eyepiece,
de-focus a bright star until a ring pattern with a dark shadow
appears (see gure 6-3). Center the de-focused star and notice in
which direction the central shadow is skewed.
2. Place your nger along the edge of the front cell of the
telescope (be careful not to touch the corrector plate), point-
ing towards the collimation screws. The shadow of your nger
should be visible when looking into the eyepiece. Rotate your
nger around the tube edge until its shadow is seen closest to
the narrowest portion of the rings (i.e. the same direction in
which the central shadow is skewed).
3. Locate the collimation screw closest to where your nger is
positioned. This will be the collimation screw you will need to
adjust rst. (If your nger is positioned exactly between two of
the collimation screws, then you will need to adjust the screw
opposite where your nger is located).
23
FIGURE 6-2
Even though the star pattern appears the same on both sides of focus,
they are asymmetric. The dark obstruction is skewed o to the left side
of the diraction pattern indicating poor collimation.
INSTRUCTION MANUAL
FIGURE 6-1
Collimation Adjustment Screws
Collimation
Screws
Corrector
Plate
… 23 …


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