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Buying a telescope is a daunting task for a newcomer. It all depends on your astronomy goals and careers. There is no perfect one which suits all observers in all conditions. You have to look for the features you want in your telescope and select the best one's according to your requirement.

Selecting the proper type

• The refractor type telescopes best suit for watching moon and major planets. Refractor telescopes are long & thin, and known for their sharp, detailed and contrasty images. They collect light through multi-element lenses. If you are just a starter then a small, quality achromatic refractor of 60 to 90 mm aperture would be a good one. The best thing about a refractor telescope is that they are inexpensive, portable and almost maintenance free. A refractor telescope is also useful when you will be mostly observing from city or the surrounding areas where the night skies are lightly polluted.
• Reflector telescopes are also known as Newtonian telescopes. They are good for planetary as well as deep-sky viewing. However Newtonian telescopes are more fragile and need more maintenance than others. These telescopes collect light with a curved, concave mirror and with the help of their large apertures, they show fine, highly-resolved images. The reflector scopes are not suitable for terrestrial viewing because they produce an upside-down image.
• Catadioptrics use both lenses and mirrors to collect and focus the incoming light. They are also called compound telescopes. Catadioptrics scopes are considered the most versatile telescopes and gives great all-around performance. They use a large aperture in very compact tubes. They show magnificent images of the moon, planets and faint deep-sky objects, when viewed in dark skies away from urban areas. These scopes are best suited for astrophotography. Compared to other two, these scopes have a wide range of accessories available. They can be entirely computer controlled.

Factors affecting the performance of a telescope

• Aperture: Telescopes collect light from distant objects and focus it to produce images. The light collecting capacity of a telescope is the most important feature. It is the aperture of scope (diameter of mirror or lens) that is responsible for gathering light. Larger the aperture, the more light gathered, the more you'll see.
• Telescope Mounts: There are three basic mounts for telescopes altazimuth, Dobsonian, or equatorial. Altazimuth is the simplest type of mount, providing up-down, left-right motions. It is mainly recommended for terrestrial viewing and casual stargazing. The Dobsonian mount was basically designed for easy maneuvering of large reflectors of more than six inches. It is a boxy altaz-type mount sitting close to the ground. Equatorial mounts are designed for the purpose of astronomical viewing. These mounts are more expensive and complicated than the altazimuth mounts. With the help of these type of mounts users can track or follow the motion of celestial objects through the sky with a single manual hand control.
• Magnification: Magnification should never top the priority for buying a telescope. The quality if image degrades with magnification. Practically 300X is maximum magnification for good quality images. Telescope's magnification is also known as its power and it is adjusted by changing eyepieces. Ideally there should have been three eyepieces for the magnification of a scope: one low, one medium and one high. Lower powers of 30 - 50X are recommended for observing galaxies, star clusters and nebulae as they are spread over a wide area of sky. For observing the rings of Saturn, Jupiter, studying craters and valleys of the Moon's surface medium power of 80 - 100X are advised. Higher powers of 150 - 200X allow the astronomers to observe mountain peaks and fine lunar detail, the surface features of Mars.

I am a laboratory analyst by profession working in this industry from last 10 years. I have been running a site http://www.laboratoryequipmentworld.com on laboratory equipments. It includes the largest range of laboratory apparatus and other updated info on market, trade fairs, news, etc.

Gazing At The Stars Through An Online Telescope

To access the Internet, we must first open up our Internet browser. Once the browser has been activated we can either select one of our favorite web sites or go to the address bar and type in the Internet address that we wish to access. Generally, when typing in the web sites address we begin with the letters www. These initials stand for World Wide Web.

Now, however, by logging on to certain web sites, we can view and gain information through our computers that transcends the World Wide Web. Through our computers we can capture, view and study images that are obtained from far beyond the earths atmosphere. Specifically, through the internet, we have the opportunity of viewing worlds beyond our world by accessing an online telescope.

How It Works

The process involved in accessing an online telescope viewing opportunity requires coordinating of viewing times and dates. An individual, at the participating observatory, is normally assigned to coordinate the requests. Once the e-mail has been received and the time is scheduled, the coordinator, that is facilitating the use of the online telescope, will respond to the request.

The process is completed once the telescope records the images that were viewed based on the given request. Once the images are posted an e-mail, with the link, is sent to the individual who made the request. That individual can then just simply click on to the imbedded link and access the photos that reflect their specific request provided by the online telescope.

Two Viewing Methods

The individual making the request can ask that the online telescope be utilized a number of ways. In addition, the observatory may honor requests for different colored filters to be utilized when requested by the viewer.

One of the viewing methods includes the viewer requesting that certain specific coordinates be captured. These coordinates may correspond to the position of a specific star, system, etc. If the person making the request is asking for specific coordinates to be observed, they can accomplish this by accessing the available catalogs that can help provide these specific coordinates.

The other method simply provides an image by the online telescope of the general areas of space. The online user can simply request that the planet Mercury, Venus, Jupiter, etc, be viewed by the online telescope and that its image be captured. In addition, this method can simply request that general areas of deep space be observed.

About the Author

Rohit Chopra has written several useful articles on topics like
Telescopes,
Telescope Lens,
Meade Telescope,
Hubble Telescope, etc. Get more useful
information on Telescopes at
http://www.digitalphotographywiz.com

I have a cheap telescope with 8x magnitude with low quality lens....?

I use it frequently (1 hour a day) to watch stars, planets......
I use it mainly to watch moons of jupiter... I strain my eyes very much to focus on the faint moons of jupiter.........
Will straining my eyes for 1 hour a day with my telescope made of low quality lenses cause any problem to my sight?

no.. that nights sleep will recover your problems.. headaches yes.. future chronic problems.. no..

3D Attacks Mars
SAN DIEGO, CALIF.: The Southern California company that delivered two high-definition camera systems for the next Mars Rover enlisted James Cameron to develop systems for capturing 3D images.

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