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ENGLISH I 21
CARE AND CLEANING OF THE TELESCOPE
While your telescope requires little maintenance, there are a few things to remember that will ensure your telescope
performs at its best. Occasionally, dust and/or moisture may build up on the objective lens. Special care should be taken
when cleaning any instrument so as not to damage the optics.
If dust has built up on the optics, follow these steps, in order, to clean your scope:
1. Use a camel hair brush to gently remove the larger particles.
2. Use a photographer’s squeeze bulb to blow away any loose debris. You can also use a can of compressed air, such as
those sold for cleaning computer keyboards, but you need to be careful. Avoid using cans that are almost empty and be sure
to hold the air can vertically. Failure to do this can result in the can spitting propellant out onto the optics. Hold the optical
surface at an angle to the spray from the can for approximately two to four seconds.
3. Use an optical cleaning solution of over-the-counter isopropyl alcohol and distilled water in a 50/50 mixture. Apply this solution
to a white unscented tissue, then apply the tissue paper to the optics. Low pressure strokes should go from the center of the
lens (or mirror) to the outer portion in straight lines like spokes on a wheel. Do not rub in circles!
You may experience dew build-up on the optics of your telescope during an observing session. If you want to continue
observing, the dew must be removed, either with a hair dryer (on low setting) or by pointing the telescope at the ground
until the dew has evaporated. If moisture condenses on the inside of the optics, remove the accessories from the telescope.
Place the telescope in a dust-free environment and point it downward until the moisture evaporates.
To minimize the need to clean your telescope, replace all lens covers once you have finished using it. Since the telescope
tubes are not sealed, the covers should be placed over the openings when not in use. This will prevent contaminants from
entering the tubes.
Internal adjustments and cleaning should be done only by the Celestron repair department. If your telescope is in need of
internal cleaning, please call the factory for a return authorization number and price quote.
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