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TELESCOPE MAINTENANCE. Celestron 21038 Travel Scope 50, 21035 Travel Scope 70
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Celestron 21035 Travel Scope 70: With its top-quality materials and simple setup, this compact and portable telescope offers both terrestrial and casual astronomical observation capabilities. Featuring coated glass optics for clear images, an erect image diagonal for correctly oriented views, and a smooth functioning altazimuth mount for easy pointing, this telescope is ideal for beginners. Explore the wonders of the night sky or observe distant objects during the day with ease.
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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 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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Table of contents
- 3 INTRODUCTION
- 5 ASSEMBLY
- 5 Setting up the Tripod
- 6 Attaching the Telescope Optical Tube to the Tripod
- 6 Moving the Travel Scope Manually
- 7 Installing the Diagonal & Eyepiece
- 7 Installing the Finderscope – Travel Scope 70 only
- 7 Aligning the Finderscope
- 8 TELESCOPE BASICS
- 8 Focusing
- 8 Calculating Magnification
- 8 Installing & Using the Barlow Lens
- 9 Determining Field of View
- 9 General Observing Hints
- 10 ASTRONOMY BASICS
- 10 The Celestial Coordinate System
- 11 Motion of the Stars
- 12 CELESTIAL OBSERVING
- 12 Observing the Moon
- 12 Observing the Planets
- 12 Observing the Sun
- 13 Observing Deep-Sky Objects
- 15 Seeing Conditions
- 16 TELESCOPE MAINTENANCE
- 16 Care and Cleaning of the Optics
- 17 TECHNICAL SPECIFICATIONS