It is possible to learn about telescope construction through various sites on the internet. Telescope making is also considered an art by various people. It is not just readymade telescopes which are well made. Amateur constructions are often good enough to give professional instruments a run for their money. Many authors have written about telescope construction at home, and such works are available for your perusal at local libraries also.

Simple instructions that can help you construct your own telescope are described below. The essential components required for the construction are:

1. Two magnifying glasses (reading lenses are sufficient, with one lens being slightly larger than the other one)

2. A cardboard cylinder (e.g. from a roll of gift-wrapping paper)

3. Duct tape

4. Permanent marker

5. Scissors

6. A measuring scale

7. Printed paper

Place the larger lens on the printed paper. Place the second lens between eye level and the bigger lens such that the print on the paper is clearly visible. This happens only when the print is at the focal point of the lens. In such a position, distance between the two lenses should be measured.

One inch from one end of the cylinder, mark the spot and cut a slot into the tube. This slot is meant to hold the larger lens. The previously measured distance being taken as a reference, a second slot must be cut into the tube to hold the second lens.

Place the two lenses in the slots such that the bigger lens is at the front end and the smaller one is towards the back. Tape the lenses into position using the duct tape. The portion of the tube behind the smaller lens can be cut off so that it is easier to view through the lens. View the print on the paper through the eyepiece, i.e. the smaller lens now. Adjust the distance between the glasses if the print is not in exact focus.

This is the simplest method of constructing a refracting telescope on your own at home. Several online pages will be able to provide you with assistance on this process. If you research carefully before starting out on the task, the whole process will not be a very difficult task to accomplish. The most important thing is to know the principle behind each component of the telescope, specifically the magnifying lenses. If you’re making a different kind of telescope, you will be using mirrors instead of lenses. If this information is known, constructing your own telescope will be a cinch.

How Do Telescopes Work – Telescope Making Made Easy is a post from: Meade Telescopes

First and foremost, there are three basic types of telescopes: reflector, refractor, and combo catadioptric.

· The reflecting telescope (or Newtonian) basically uses a concave design and mirror lens to reflect light off an object in the distance, to perceive it more closely. These types offer great light-gathering technologies, are typically stationary, and are the least expensive of the three. They are the best beginner telescopes for those interested in casually exploring the night sky at a value price.

· The refractor telescope works by using a number of lenses to refract or bend the light that is being transmitted by a distant object, to gain a more focused magnification from the eyepiece. Refracting telescopes are comparatively much more expensive; but also offer sharper, high-contrast, accurate views of the stars, planets, and moon above. It is also worthy to note that another bonus of the refractor is that it performs with aplomb in all atmospheric conditions, unlike the former.

· Lastly, is the catadioptric (example: matsutov-cassegrain) telescope. This type compasses both the bent lens system of the refractor telescope, as well as the mirror technology of the reflector telescope. Middle ground of all three, the catadipotric boasts high-quality precision, resolute optical technologies, convenient portability, and promises a more digestible price range than the refractor models.

Once decided upon what type of telescope you'd like to invest in; the next step is figuring out what technical specifications to look for, as far as magnification, aperture width, focal length, resolution, etc.

· Magnification is the first number listed in the formula usually expressed for a telescope, example: 100X5. The magnification in a 100X5 would be 100, and means that this telescope will give you 100 times the magnification you would perceive an object with than the naked eye. It is necessary to recognize that more is not always better, because the more the object is magnified, the less light is allowed to view it with.

· Aperture is the second number denoted by the formula (In this case: the 5, of the example 100X5), and is simply the diameter of the objective lens. The aperture measurement tells us how much light will be allowed in offering clarity to the object you are looking at. The larger the diameter, the more light allowed; and so it is necessary to adequately balance magnification (power) with appropriate aperture.

· Focal length (represented in millimeters) is the length that light has to travel within your telescope to reflect and perceive the object. The higher the focal length measurement: the higher the magnification, the larger the image, and the smaller the field of view.

· Resolution is the telescope's capability to render the object's image in detail. The higher the resolution, the sharper the details you will be able to perceive. This is directly in relation to the aperture width, as discussed earlier: the larger the aperture, the better the resolution.

Once you recognize the different types of telescopes, and the relationship of the basic specifications as listed above; you can begin to maneuver your way around selecting one for yourself. How casual your intended use, what objects you'd like to view, and how much you'd want to invest; all play a big part in determining the best telescope for your uses; but now armed with the basics of buying a telescope, you're sure to find the perfect new optical device with ease.

Buying A Telescope: Tips For First Timers is a post from: Meade Telescopes

Well, you have it. Here is the article, that can help you get into astronomy. First it is important to consider a few points, when wondering how to buy a telescope. The first and obvious step, is buying a telescope. However, there are some other parts, which go to make your hobby in astronomy, so much more fun.

You need 3 things to get the most out of astronomy, and 1 other item, which I recommend:

1. A telescope (this telescope buying guide, should help with that!)

2. A star atlas

3. A good practical book on astronomy and telescopes

* Optional

4. A notebook

Let us look into these necessary items to get the most out of astronomy. Remember, you can easily get into astronomy, by studying and learning the constellations. Some people in our human history, devoted there lives to constellations, some even to just 1 or 2!

* 1. How To Buy A Telescope?

Your first step before buying a telescope, is to consider what you want it for. Remember, telescopes are scientific instruments. This is an investment, and generally more you pay, more better telescope you get, which can literally last a life time.

If you have been wondering how to buy telescopes, you have come to the right place! Buying a telescope requires buying from either 1 of 3 places. From a specialized telescope shop, though these are not always easily found. The next is through mail order and the third, which is the easiest, is online.

There are 2 main types of telescope, one is reflector telescopes (catoptric), and refracting telescopes (dioptric). One has a big mirror, and the other is longer, and slimmer. They both pretty much do the same objectives. However, many people prefer the reflector for deep space viewing.

* 2 & 3 - A Good Star Atlas And Practical Astronomy And Telescopes Book

Getting the most out of the science of astronomy, is not about buying the biggest telescope or the high price you paid. Instead it is about knowing what is where, and where to look.

Galileo's telescope was so inferior to today's telescopes readily available, that he said that Saturn has ears! However, he still invested a lifetime into the study of these objects.

The key to knowing where to look, is with a good star atlas, and a practical astronomy book, designed for small telescope use. A book called - Turn Left At Orion, seems to be the most popular, and easy to follow.

* 4. A Notebook

Viewing Saturn, Jupiter, and the Moon, can be fun home scientific tasks, but what happens next? We get bored! The truth is, to get the most out of astronomy, is to treat it as a science. Even if you are the worst painter, you still can record a detailed picture of the Moon's craters over days, and see the differences. This will go a long way in the future, and will allow you to look back, and see what many people will never see, and all because you invested into the science of astronomy.

Telescope Buying Guide – How To Buy A Telescope? is a post from: Meade Telescopes

Purpose of a Telescope Mount

A telescope mount provides a stable platform for your telescope, whether it is a refracting telescope, reflecting telescope, Dobsonian telescope, or catadiotric telescope. A telescope mount will ensure that your viewing of a celestial body is not interrupted by unexpected movement. It also determines how you will position your body relative to the telescope to view the night's sky, determining how comfortable you will be over any extended period of stargazing.

Types of Telescope Mounts

Altazimuth telescope mounts are generally used on a Dobsonian type telescope. These telescopes look like a large canister and are mounted on a chassis that provides limited mounting capabilities. With this type of mount, the telescope can be adjusted in up and down or left and right positions. This range of movement in a telescope mount is generally fine for the beginner and intermediate astronomer.

Equatorial mounts are more advanced and allow for greater movement to coincide with the movement of planet Earth. As good as this sounds, there is a level of skill required by the user. The user will need to understand the planet movement and be required to make minor adjustments to the telescope mount. This type of mount is usually reserved for higher quality telescopes, so it is really geared for the intermediate to advanced astronomer. However, with a little experience and practice, the mount could be used by most stargazers.

In this hi-tech era, computers have become an integral part of astronomy and are used to move and track heavenly bodies. Well, an advanced telescope mount, though expensive, is available that provides this kind of computer tracking and superior viewing options. This mount even facilitates the viewing through the computer monitor as well as the eyepiece, with a few clicks of your mouse moving the mount into position.

Choosing the Right Mount

In choosing the right mount, you must first determine what the intended use of the telescope is. Other considerations are the skill level and specific needs of the operator. Determining the type of terrain the mount will be used on will dictate the stability requirements. And, of course, your astronomy budget will play a major role in what type of telescope mount you will purchase.

Choose a mount that will allow for a comfortable body position for times of extended viewing. Nothing can ruin a stargazing experience faster than being required to contort your body in unnatural positions to get a satisfactory view of your desired object.

So, to choose the right telescope mount, take the time and effort to research the different brands of telescope mounts and the various quality levels available. Then, and only then, choose the one that best suits your needs and falls within your budget limits. It can make the difference between a comfortable, enjoyable stargazing experience and a cramped, short-lived outing.

Why A Telescope Mount Is A Necessity For Stargazing is a post from: Meade Telescopes

In addition, there are two types of telescopes. One type of telescope is called the refractor telescope and the other is known as the reflecting telescope. The difference between these two telescopes is how the light is captured.

Refracting and Reflecting Telescope

The refracting telescope obtains the light through its objective that is made out of glass. Basically, in this type of telescope, the glass lens is situated towards the front of the telescope. As the light is captured by the objective, it is then refracted or deflected through a lens which allows for the viewed image to be magnified. Examples of this type of telescopic equipment include scopes that are used on rifles, binoculars and spyglasses.

A reflecting telescope uses a mirror as its objective. This mirror is located towards the distal end of the telescope. In addition, the mirror has a concave shape. The curvature of the mirror allows for the midpoint of the mirror to be the focal point for all of the light that strikes each part of the surface of the bowl-like mirror. This reflection is then captured by the lens to view the item of interest.

Advantages Of The Reflecting Telescope

There are several advantages to the use of a reflecting telescope. The major advantage is that distortion of what is being viewed is minimal. This is because, through the use of the mirror, the wavelengths are all reflected consistently. This advantage also leads to the reflecting telescope being less expensive than the refracting telescope.

In addition, through the use of the mirror as the objective, the support for this mirror can be all along the posterior portion of the telescope. This allows for the housing to be very large which will accommodate a larger mirror. Larger mirrors mean more light which results in increased visibility.

Disadvantages

However, as with anything else, there are a few disadvantages in the use of a reflecting telescope. One of those disadvantages is size. This is due to the fact that these types of telescopes can accommodate larger mirrors. This results in the telescope itself being larger which may prove to be an issue when storing or relocating the reflecting telescope.

In addition, because of the use of mirrors, there may need to be occasional adjustments made so that optimum light alignment is maintained.

Reflecting Telescope Information is a post from: Meade Telescopes

When two lenses are combined together, they are able to collect more light than individual lenses. This is the main principle behind Galileo’s telescope. Most of the telescopes in use today, use the same principle. The human eye also works on a similar principle, but cannot collect too much light. Telescopes are able to gather more light because of the double lenses used in its construction. These lenses gather light and build an image by focusing the light at a point. Refraction is the mechanism in use to form such images. As a result, telescopes are also called refracting telescopes or refractors. The phenomenon by which the collected light bends and forms images is known as refraction.

Images were magnified by a factor of 30 in Galileo's invention. However, the shape of the lenses he used was such that his image became blurred and distorted. But no one had ever invented something so exciting with which to observe the night skies before Galileo's telescope. Galileo used his telescope to view the moon and observe it closely. He was also the one to figure out that the magnification factor of a telescope was provided by the ratio of the power of the concave lens to the power of the convex lens. So he premised that the simplest way to increase this magnification factor was to use a high power concave lens with a weaker convex lens.

In Galileo's time, there were only low strength lenses available. Due to this restriction, Galileo decided to make his own lenses. He was soon able to achieve a magnification of 9x with lenses hat he had ground himself. His telescope was fitted with his own lenses. It was just another feather in his already well-decorated cap.

As time passed, Galileo improvised on his primitive telescope, making several modifications to it. He also demonstrated his invention at the Senate of Venice, and several senators climbed the highest towers of the time to observe the horizon with Galileo's invention. They viewed the distant ships from their perches and decided that the telescope was a very useful military device.

The telescope changed the face of Astronomy and became an indispensable part of the study. Several inventors used the same principle and made telescopes of their own. Gradually over the years, the study of astronomy benefited immensely from the telescope and its uses. The same principle was employed in the construction of much more powerful telescopes that made it possible to understand our plane and its surroundings more comprehensively, all thanks to Galileo's wonderful invention.

How to Use a Telescope – Galileo’s First Telescope and Its History is a post from: Meade Telescopes

First, whatever you do, don't buy a telescope from a department store or drug store! The telescopes you'll find there, while cheap, are typically of very low quality. They're appropriate for a child in elementary school: If the child breaks it, you're out only a modest amount of money. But if you're buying for a teenager or an adult, buy from a store that specializes in telescopes, or buy online. Good telescope brand names include Antares, Orion, Celestron, and Meade.

While there are several types of telescopes, most beginners would do well to purchase what is called a "Dobsonian" telescope. Dobsonian telescopes (or "Dobs") are relatively low-cost, yet high-quality telescopes. Generally speaking, they do not have any high-tech, computerized gadgets on them. Yet their optics are just as good as the overwhelming majority of computerized telescopes that cost thousands of dollars. Once you gain some experience using a Dob -- and should you eventually decide to make astronomy into a serious hobby -- you might one day purchase a more expensive "Schmidt-Cassegrain" or "apochromatic refracting telescope." But start with a Dob!

Astronomers compare telescopes primarily by the diameter of their main ("primary") mirrors. This is referred to as the "aperture" of the telescope. You'll want to get a Dob with an aperture of either 6 inches (150 mm), 8 inches (203 mm), or 10 inches (254 mm).

If you can afford it, purchase either an 8 or 10 inch version: The larger the diameter of the mirror, the easier it is for you to see dim objects (like galaxies and nebulae) in the night sky. Prices range from roughly $230 USD for 6-inch apertures to $500 USD for 10-inch apertures. The telescope should come with two or three eyepieces: If it doesn't, shop somewhere else. You'll use the eyepieces to control the magnification of the telescope. For example, with one eyepiece in the telescope, you can see the entire surface of the Moon. But with another eyepiece, you can zoom in on a crater.

Also, consider purchasing the following accessories:

Nightwatch: A Practical Guide to Viewing the Universe -- a really good introductory book by author Terence Dickinson;

A subscription to Astronomy magazine -- a monthly publication with beautiful photos, a guide to the night sky, product reviews, and the latest astronomy news;

Some astronomy software -- such as Name A Star Live's Virtual Planetarium™ software;

A planisphere -- Use this simple, lightweight, handheld device to identify constellations and major stars in the night sky;

An inexpensive pair of binoculars -- These are good for helping you navigate around the night sky as you search for a galaxy, nebula, or star to observe through your telescope; and

A TELRAD -- Most telescopes come with a very small telescope, called a "finderscope," mounted on top of the main telescope. As the name implies, a finderscope helps you find the astronomical object you're looking for through your main telescope. But most astronomers prefer to use a TELRAD -- a battery-powered device that projects a red bullseye in the night sky. It's much easier to aim a telescope with a TELRAD than with a finderscope.

These tools will help you learn the constellations, and otherwise help you get started in astronomy. Also, consider joining a local astronomy club where you can gain experience using various types of telescopes, and get help learning the night sky.

Happy stargazing!

Telescope Shopping Tips From an Experienced Astronomer is a post from: Meade Telescopes

Types of telescopes:

There are three basic types of telescopes -- Refractors, Newtonian reflectors, and Catadioptrics.

Newtonian Reflector Telescopes:

Newtonians usually use a concave parabolic primary mirror to collect and focus incoming light onto a flat secondary mirror that in turn reflects the image out of an opening at the side of the main tube and into the eyepiece.

Refractor Telescopes:

Refracting telescopes have an objective lens at the front of the tube. The light exits out through the back of the tube to the eyepiece. Since many observations are made high in the sky, a right-angle diagonal is used to avoid neck strain. This also provides an upright image making them suitable for terrestrial observations. A refractor has several advantages over other designs. The tubes are enclosed so that dust and moisture do not enter the tube, they have fixed optics that do not normally require collimation, and they do not have a central obstruction which reduces the light entering the tube. A refractor typically will give higher quality images of planets than other telescopes of similar aperture.

Catadioptric Telescopes:

Telescopes using a combination of both mirrors and lenses are called catadioptrics. There are many different designs. Examples of these are the Schmidt-Cass grain and the Maksutov-Cassegrain. Usually a full aperture lens is used to correct aberrations in a compound reflecting telescope. The corrector lens also increases the performance of the instrument as air currents are eliminated. The main advantage of the design is that, because the light path is folded back on itself, it provides a very portable, short physical length telescope with a long focal length.

Benefit:

1. The aperture of a telescope is several times larger than the aperture of human eye so that the objects that can not be normally seen by unaided eye can be seen. Light- gathering power of a telescope is proportional to the area of its aperture and hence depends on the square of the radius of the mirror. Therefore a 20 cm diameter telescope collects four times more photons than a 10 cm diameter telescope.

2. A telescope can be equipped to record light over a long period of time, by using photographic film or electronic detectors such as photometers or CCD detectors while the eye has no capability to store light. A long-exposure photograph taken through a telescope reveals objects too faint to be seen with the eye, even by looking through the same telescope.

3. A third major advantage of large telescopes is that they have superior resolution, the ability to discern fine detail. Small resolution is good. The resolution is directly proportional to the wavelength being observed and inversely proportional to the diameter of the telescope.

What Are Telescopes and Its Benefit? is a post from: Meade Telescopes

Now, there are two general categories for telescopes that are optical- first is the refracting-type telescope, and the second is the reflecting-type telescope. What is a refracting telescope? A refracting telescope has three general parts (which means, no matter how modern a refracting telescope is, it would still have these main parts as foundation for other parts): the telescope tube, the objective lens and the eye piece lens. The simplest explanation for a refracting telescope would be this: a refracting telescope is composed of two lenses that are convex, which are generally more thick in the very center than at the edges. This design allows colors and light to be focused more clearly and transmitted more efficiently to the eye piece lens.

The part of the telescope that is more near to the object being observed (may it be a turtle, a star or someone in a far away window) is called the objective lens. What happens technically is that this particular lens collects the color and light from a particular source, and takes focuses this as an image that is upside down inside the tube of the telescope. In simpler telescopes, the images remain inverted; but in the more modern versions, the images can be righted by special lenses inside the telescope. Other modern versions of the telescope also have recording devices located near the eye piece lens, so you may be able to record the things that you are observing. These types of telescopes are useful especially if you like observing meteor showers, and other types of celestial phenomena that don't visibly happen very often in the world's open skies.

Reflecting telescopes, on the other hand, utilize a different type of lens. Instead of having a convex lens, reflecting telescopes have a curved lens that were specifically crafted to bring back and magnify images. The power of a reflecting telescope to gather and focus light from a source can be achieved by increasing the area of the reflecting telescope's mirror. Large reflecting telescopes that may be found in astronomical installations were built specifically to observe the skies twenty four hours a day.

A Brief Introduction to Telescopes is a post from: Meade Telescopes

Which statement is correct reguarding a refracting telescope?

*It produces an enlarged real image.
*It produces an enlarged virtual image.
*It produces a reduced-size image.
*It produces a small, upside-down image.

option 4. coz a telescope helps us see images of gigantic objects, so a diminished image wrt object forms. also, the final image formed is upside down(though it is virtual) coz the ist image formed is real and inverted.
trust me, i just gave my phyics board exams.

For More Refracting Telescope Info Click On The Links Below

	Celestron 21061 AstroMaster 70 AZ Refractor Telescope
	TE3) Celestron astromaster 70AZ scope

	Meade 20218 NG-70SM 70mm Altazimuth Refractor Telescope
	Meade 20218 NG-70SM 70mm Altazimuth Refractor Telescope Meade's value priced NG-70SM Altazimuth Refractor is an affordable entry level telescope that features an easy to use Altazimuth mount with slow motion controls for precise tracking...

	Celestron 21037 PowerSeeker 70EQ Telescope
	70mm (2.8") diameter refractor, 700mm focal length (f/10), German equatorial mount with RA and DEC slow-motion controls and setting circles, 5x24 finderscope, 20mm eyepiece (35x) - 1-1/4", 4mm eyepiece (175x) - 1-1/4", erect image diagonal - 1-1/4", Barlow lens 3x - 1-1/4", adjustable aluminum tripod with accessory tray, "The Sky Level 1" CD-ROM...

	Celestron 21035 70mm Travel Scope
	The Celestron 21035 Travel Scope 70 is a compact 70mm refractor telescope optimized for portability and convenience. The telescope, the tripod, and all the accessories fit conveniently into a padded backpack style soft carrying case...

	Celestron 21041 60mm PowerSeeker Telescope
	Celestron's value priced PowerSeeker 60 is an affordable entry level telescope with some nice extras like a correct image prism and "The Sky" astronomy software included. The package also includes an Alt-Azimuth mount with adjustable aluminum tripod, high and low power eyepieces, a 3X barlow lens, and a 5 power cross hair finder scope...

	Celestron 21036 PowerSeeker 70AZ Telescope (Black)
	Celestron's value priced PowerSeeker 70AZ is an affordable entry level telescope with some nice extras like a correct image prism and "The Sky" astronomy software included. The package also includes an Alt-Azimuth mount with adjustable aluminum tripod, high and low power eyepieces, a 3X barlow lens, and a 5 power cross hair finder scope...

	Celestron PowerSeeker 80EQ Telescope
	Celestron PowerSeeker 80EQ 45 - 225X Refractor Telescope opens up the wonders of the universe to the aspiring astronomer. Amateur astronomy is a great hobby you can enjoy year-round, and Celestron's PowerSeeker Telescopes are the ideal choice for affordable stargazing enjoyment! PowerSeeker Scopes are quick and easy to set up, even for the novice...

	Celestron 21062 AstroMaster 70 EQ Refractor Telescope
	Celestron’s AstroMaster 70 EQ combines the solid optical performance of a classic achromatic refractor with a German style equatorial mount. The Astromaster 70 features easy no-tool setup and much better optics than 60mm beginner scopes...

	CELESTRON Powerseeker 50 Refractor Telescope
	The Celestron® PowerSeeker 50 telescope is a great way to open up the wonders of the universe to the aspiring astronomer. It's portable yet powerful with ample optical performance to excite any newcomer to the world of amateur astronomy.

	Orion GoScope 80mm TableTop Refractor Telescope
	For portability and low-power, wide-field viewing, look no further than the Orion GoScope 80mm Refractor Telescope. This ultra-compact, entry-level Mini-Dob makes a great quality first telescope for beginning stargazers...

Are you thinking of buying a telescope? Perhaps you are wondering - what are the differences between refracting telescopes and reflecting telescopes, and which are better refracting telescopes or reflecting telescopes. As you read this article, you will discover more about which is the best telescope to purchase.

There are many different telescopes for sale. These different telescopes, however, fall into mainly 2 categories. The first is refracting telescopes, which is the one that reminds us most of Galileo's telescope. The other is reflecting telescopes, which is commonly attributed with Isaac Newton.

Both refracting telescopes and reflecting telescopes have benefits, advantages and disadvantages. The key element here is that your needs are the main focus, and as you read this article, you will discover which type of telescope is best for your needs in backyard astronomy.

- Information About Refracting Telescopes

The design of the refracting telescope is also the type you find on binoculars, though in pairs! How a refracting telescope works, is that there is a lens at the front of the optical tube assembly.

Light enters the optical tube assembly, and goes right to the lenses at the back of the telescope. And finally meets the eye, where an image of Saturn, perhaps can be seen.

A refracting telescope is good, in that it is enclosed. The simple design, allows it to be maintenance free, for a number of years. The simple design also makes it easy to use, which is great as a telescope for children.

- Information About Reflecting Telescopes

How reflecting telescopes work, is that light enters the optical tube assembly, and goes straight to the back of the telescope, where it meets a big mirror. This mirror then reflects the light back up the tube.

Now, the light meets a secondary mirror, which is near to the top of the telescope. As the light bounces, it enters the lenses, and finally meets the eye.

Reflector telescopes are great in that they offer good price verses performance ratio. Reflecting telescopes can be much larger than refracting telescopes.

- Refracting Telescopes Compared With Reflecting Telescopes

Realize however, that the refracting telescopes are not cheap. Compared with reflecting telescopes they can be more expensive for similar performance.

For viewing the planets, buying a refracting telescope may be the best way to go, however, if you desire to see more of the heavens, there is nothing that compares, as with a reflecting telescopes. Though you may be able to get similar performance with refracting telescopes, you would need to invest a much bigger investment, which brings back the question - couldn't the investment in a reflecting telescope be much better?

Here are some telescope resources that can help you find and buy a telescope:

- Meade refracting telescopes

- Refractor telescopes for sale

- Buying astronomy binoculars [http://www.buyingbinocularsuk.info]

[

Many thanks for reading our Refracting Telescope article

Refracting Telescope is a post from: Meade Telescopes