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		 Tweaking the Celestron 90  | 
	
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		 Under Construction! 
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		 Collimating the laser collimator. Without the secondary mirror I pointed the telescope to a white wall, then I rotated the laser and verified that the beam always hit the same point.  | 
	
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		 Centering the corrector plate and the secondary mirror. The laser beam hit out the little circle, so I moved the plate until the beam hit the center, then I locked the plate.  | 
	
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		 The secondary mirror and the corrector plate are centered, the laser beam hit the center of the circle, but the secondary mirror seems to be a little out of collimation.  | 
	
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		 Now the secondary mirror should be collimated, the laser beam return back to the source, but a star test is needed to verify the collimation. Test soon..  |