Telescope | Eyepieces

Telescopes are instruments used to observe distant objects. It makes distant object appear nearer and magnified.

Out of several hundred models of telescopes it is really a challenge to buy one that suits the need of a buyer. Here are few points that help one choose the one best fulfills the usage of a buyer.

There are two basic types of Telescopes:

1. The Reflector Telescope: This type is best suitable for sky based observation as it does not give distorted images. If you are an amateur astronomer choose a reflector telescope. Different price ranges are available and the costlier models allow us to observe the extreme reaches of the universe.

2. The Refractor Telescope: This type shows some distortion due to different colour bending into the lens (as two lenses concave and convex are used). Going in for costlier ones will put off this complaint. Due to this distortion reason it is best for earth based viewing. And if you are traveler who move around with your backpacks and telescope then choose a smaller, handy light weight one that is compact to carry.

In spite of any brand, model or pricing it is always important that you go in for a wider objective telescope for a clearer and better magnification. As in optics how much high you pay high results and features will be offered to you.

The other few guidelines of maintenance:

• Get maximum number of accessories that come along with a telescope.
• Learn all the features available in a model and try using them.
• Always keep the telescope in its case safely.
• Dust and clean the telescope after every use.
• Do not ever try to service or repair it on your own and always seek for a well trained technician's help for a good maintenance of your telescope.
• Always handle them with good care as rough handling will cause misalignment of the lens which leads to aberration of the images.

By Victor Thomas
Article Source: http://EzineArticles.com/?expert=Victor_Thomas

Telescopes can help you to see far off objects. The distance is determined by the type and quality of your telescope. Of course, a toy store telescope will not be able to put into view the same objects as the Hubble Telescope can. Somewhere in the middle is a modest, but good-working telescope for the amateur astronomer.

To see how this viewing tool works, you must understand something about the eye, particularly about the retina. There will always be things you cannot see from far away. You must ask yourself why you cannot see them. There are two main reasons.

One reason you have trouble seeing objects that are far from you is that not enough light from the object reaches your eye. When the item is shrouded in darkness, it is hard to make out. The other reason is that the object takes up so little space on your retina that it is impossible to get a clear picture of it.

Therefore, the goals of the telescope are to focus more light on the retina, and to make a larger image of the object strike the retina. That way, it will stand out in a way that will let you examine the item clearly. Two main types of telescopes have been made to accomplish these purposes.

The refractor telescope is one type, and it uses an objective lens. The other type is a reflector telescope, which uses a primary mirror. In either case, the lens or mirror brings together plenty of light from the faraway object you are trying to study. It further focuses that light and the image it creates into a sharp point.

That is just one part of the process. If that was all that the telescope did, you would not be able to see anything more than a piercing stream of light. However, an eyepiece lens will solve this problem by magnifying this point of light. It will then be spread out over a much larger portion of the retina than it originally had been. This is how the image goes from being difficult to spot to seeming big enough to study easily.

There are a couple of properties that a telescope has that can help you see into the distance. The aperture is one. This is the diameter of the lens or mirror. A lens or mirror with a larger aperture is likely to gather more light and give you a brighter, clearer image.

Magnification allows the telescope to take the focused image and enlarge it. You can use different eyepieces on any telescope to get more or less powerful magnification. This gives you the freedom to change your telescope to suit your needs. At the same time, it does not affect the basic usefulness of your telescope.

By knowing how a telescope works, you can be aware of what parts might need to be replaced on your telescope if the time comes. You can also make it a part of your study to learn the wonders of man's explorations of the night sky.

Gregg Hall is an author living with his 18 year old son in Jensen Beach, Florida. Find more about astronomy as well as telescopes at here.

By Gregg Hall
Article Source: http://EzineArticles.com/?expert=Gregg_Hall

Telescopes are instruments used for viewing the objects at a distance. They are mainly used for viewing the astronomical objects. They find application in non-astronomical areas also. The working is with the help of two lenses. These lenses will work in a co-ordinate manner to give the exact image in a magnified form. There are different types of telescopes greatly used for varied purposes.

These telescopes vary in the structure and also the working. The basic types of telescopes that are available is the optical telescope and the radio telescope. There are still different types like, the Galileo telescope and the Hubble telescope.

Hubble telescope is quite a familiar term. It is used to orbit round the earth. The telescope is used to get a more clear view of the external atmosphere of the earth.

This gives images that are not blurred. This makes it quite unique among the other types of telescopes. Because of this they have an important place in the astronomical area. The telescope has been serving the humanity with the clear images for a long time.

The Hubble telescope photographs have proved to be very useful to prove the mysteries that existed in the field of astronomy. It helped to prove many unsolved issues in the solar system. The pictures taken by the Hubble telescope was not that clear in the earlier stages. Now it has become clearer with the advent of the technology.

The distances between the stars were become more accurate after the Hubble started sending the pictures. The estimated calculation was replaced with a more proven data. The galaxies that were farther were viewed in a closer view with the help of the pictures from Hubble telescope.

The pictures taken by the telescope is first stored in an archive. Later it is being transmitted to the earth. This will help the users to use it in a clearer manner. The transmitted images are clearer and free of any issues. This can get a vivid picture of what all are happening in the world beyond the reach of human eyes.

The use of the telescope is open to anyone. There will be a ratio in the time available to the users. This can vary in a range also. There are no restrictions based on any barriers to use the telescope. This will help all types of users to view the astronomical objects at any time. The use is very simple and there will be instructions that can help a novice user to handle the vision properly.

The Hubble telescope finds great use in the scientific applications. They helped in proving various unsolved truths of the astronomy in a more reliable manner. The pictures are clearer and brighter than any other telescopes in the earth. There is no scattering of the light and there is no blurred image produced.

By Steve Hill
Article Source: http://EzineArticles.com/?expert=Steve_Hill