Manual Celestron 21035 - Travel Scope 70 (page 17 of 100) (English, German, French, Italian, Spanish)

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ENGLISH I 17

TELESCOPE MAINTENANCE

While your 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 objective 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 glass surface 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 optics. Low pressure

strokes should go from the center of the lens (or mirror) 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.

Occasionally, 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 down. This will remove the moisture from the telescope tube.

To minimize the need to clean your telescope, replace all lens covers once you have ﬁnished using it. Since the cells are NOT

sealed, the covers should be placed over the openings when not in use. This will prevent contaminants from entering the

optical tube.

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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Celestron 21035 - Travel Scope 70 Manual

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