How can I clean the corrector plate on my Schmidt-Cassegrain telescope?
The outside of the corrector plate can be cleaned using a solution of 60% distilled water and 40% isopropyl alcohol with one drop of clear liquid dish soap per quart of solution. The solution is applied to a soft tissue or cotton ball and is carefully rubbed onto the corrector plate using radial strokes from the secondary mirror housing outward. We do not recommend removing the corrector plate. The corrector plate is optically matched to the mirrors in alignment and in rotation. If the inside of the corrector plate or mirrors becomes dirty, call Celestron and arrange to send your telescope in for a thorough cleaning. Celestron offers complete cleaning and collimating services. Contact the Technical Service Department at (310) 328-9560.
