Celestron 21071, 21052 manual Telescope Maintenance, Specifications, Observing the Sun

The drawing of Jupiter provides a good representation of what you can expect to see with moderate magnification, during good “seeing” conditions.

Observing the Sun

Although overlooked by many amateur astronomers, solar observation is both rewarding and fun. However, because the sun is so bright, special precautions must be taken when observing this star, so as not to damage your eyes or your telescope. Never project an image of the sun through the telescope. This can damage the telescope and/or any accessories attached to the telescope. For safe solar viewing, use a Celestron solar filter. This filter reduces the intensity of the sun's light, making it safe to view. With this filter you can see sunspots as they move across the solar disk and faculae, which are bright patches seen near the sun's edge. Before any solar viewing, please review the warning earlier in this manual.

To enable you to find objects you should have a set of Star Charts. The location of the planets may appear in local newspapers.

Observing Deep-Sky Objects

Deep-sky objects are simply those objects outside the boundaries of our solar system. They include star clusters, planetary nebulae, diffuse nebulae, double stars and other galaxies outside our own Milky Way. Unlike the sun, moon and our five major planets, most deep-sky objects are not visible to the naked eye. Celestron Sky Maps (#93722) can help you locate the brightest deep-sky objects.

Most deep-sky objects have a large angular size. Therefore, a low-to-moderate power eyepiece is all you need to see them. Visually, they are too faint to reveal any of the color seen in long exposure photographs. Instead, they appear black and white. Because of their low surface brightness, they should be observed from a “dark-sky” location. Light pollution around large urban areas washes out most nebulae making them difficult, if not impossible, to observe.

The amount of detail you can see is dependent on your observing site (dark-sky rural locations are best), atmospheric conditions, brightness of the object and your observing experience.

TELESCOPE MAINTENANCE

With proper care, your telescope should rarely need any maintenance work. To maintain your telescope in the best possible condition, observe the follow suggestions:

1.When your telescope isn’t in use, replace all lens covers to keep dust and contaminants off the optical surfaces.

2.A small amount of dust on any optical surface isn’t a problem and doesn’t need to be removed. If the dust builds up, then use a can of compressed air and a camels hair brush to remove the dust. To remove fingerprints or other contaminants, use an optical cleaning kit or the Celestron Lens Pen (#93575).

3.If the inside of the objective lens needs cleaning, it should be done by a professional. Either have your instrument serviced by a telescope repair facility or return it to the factory for servicing.

SPECIFICATIONS

	Firstscope 60’s	Firstscope 70’s
Aperture	60mm	70mm
Focal Length	700mm	700mm
Focal Ratio	f/12	f/10
Mounting	Altazimuth	Altazimuth
Tripod	Adjustable Tripod	Adjustable Tripod

NOTE: Specifications are subject to change without notice.

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