Telescopes Basics

How Telescopes work
Intro to Telescope
Telescope History
1st Galileo Telescope
Timeline of Telescope

Astronomy Today  Using a Telescope Buying a Telescope
Children Telescope
Kids' Toy Telescope

How to Make Telescopes

Amateurs Telescope
Building a Telescope Home-made Roof-Mounted Telescope
DIY Telescope

Making a Telescope  
Home-made Telescope

Telescope Components
Telescope Accessories
Telescope Parts Telescope Lenses Complete Telescope Kit
Telescope Patio Furniture 

Telescope Outdoor Furniture Celestron Nexstar 800 Accessories
Meade Telescope Accessories

Tasco Telescope Accessories

All about Hubble Spade Telescopes
Hubble Space Facts
History of Hubble Space Telescope Hubble Space Telescope and Galaxy Photography
Hubble Telescope Photography

Hubble Telescope Pictures
Hubble Space Tech.
Launching Hubble Space Tech.

Contact Us
Sitemap
Privacy Policy


 





 

Download FREE "Mystery of Telescopes" Ebook Now!

- What do you really want to do with your telescope?
- How much money do you want to spend?
- Things to consider when choosing different types of telescopes
- How to make your own telescope

and much more you'll discover inside..

Just type in your name and email address below and we'll send you the ebook instantly

Telescope Lenses

Telescope either uses a lens or a mirror for gathering and focusing light. Reflector telescopes use mirror while refracting telescopes use lenses instead of mirrors. Both have their own advantages.

As mentioned above, lenses are used in refractor telescopes. They are used to bend the light coming from the far distant objects. This bending of light enables you to see that distant object. A refracting telescope uses two lenses. One of these lenses is usually bigger than the other one.

Eye-piece uses lens in many telescopes. There are also some types of telescopes that have no lens in the eye-piece. However, eye-piece still remains the most important part of a telescope since you will see the sky through this eye-piece.

The eye-pieces usually are adjustable and are low powered. You can use the eye-piece in order to adjust the magnification of the telescope. The type of eye-piece for your own telescope depends on your personal choice. There are many different eye-pieces available today. Amongst these varieties, it sometimes becomes difficult to choose the right one.

For this reason, you should have evaluation criteria for these eye-pieces. You can evaluate an eye-piece through various characteristics like the size of the field, sharpness that it provides, optical quality, its brightness, price (varies from person to person), effects to your eyes, barrel size etc.

Huygens and Ramsden are the name of the lens designs that were used in older versions of telescopes. These are not recommended for professional astronomers because they don’t provide good quality.

Although they are quite cheaper but they don’t provide good quality. They also can’t help you against various aberrations like chromatic aberrations and light circles around various brighter objects like stars in the night sky.

Orthoscopic designed lens is ideal for both professional astronomers and other novice sky gazers. This design provides a 45 degree FOV (Field of View) which is quite narrowed and it uses 4 lenses for the eye-piece. Remember, eye-piece is the most important part of any telescope.

The main advantage of using this design over other designs is that it gives the user a sharp view without having eye strains and is recommended for viewing planets as well.

If you budget is neither too high nor too low then you should go for a Barlow lens. This sort of design will give you an average quality but still value for money. It is neither too expensive nor too cheap that could give you poor quality.

These lenses are available at price ranging from $30 to $70. They provide an average magnification which is mostly suitable for non-professional people. It is also recommended for those who have adopted astronomy as a hobby- not as a profession.

One of the most advisable tips is to look for a lens for your telescope that is adjustable in order to suit your need. If you lens is adjustable, it means that you can view stars as well as planets by adjusting your lens making it value for money.

 
Telescopes Types/Review
General Telescope Review
Celestron CPC800
Coronado Telescope
Galileo's Telescope
Reflector Telescope
LX2000R Telescope
Tasco 48t Telescope
Unitron Telescope
Well-known Telescopes

Telescopes Tech.
Current Telescopes Development
Next Generation Telescope
Optical Technology Telescope
Radio Technology Telescope

Galaxy Photography with Telescope
Telescope Photos Space Telescope Photographs
Colour Telescope Pictures
Spitzer Space Telescope Pictures
Very Large Telescope (VLT) Photographs