Refractor Telescope Astromony
May 23rd, 2010
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Posts Tagged ‘refractor’
refractor telescope orion
May 8th, 2010
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Orion Observer 70mm Altazimuth Refractor Telescope List Price: $139.95 Sale Price: $139.95 Average Rating:   |
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Our Observer 70 is the perfect telescope for that budding astronomer in your family. This scope excels in both quality and performance. Its 70mm multi-coated achromatic objective lens - focal length 700mm focal length (f/10) - gathers 36% more light than a 60mm... |
Telescope tips ...?
Wanted to get my first "real" in the coming weeks telescope. I say first because I have a refractor Discovery Channel telescope for Christmas when I was 10 and really can only see the moon. I have been looking at two reflector telescopes, in particular. Looking at the Orion and Orion SkyQuest XT6, the Starblast 6. Both have six openings and both cost exactly the same. The only thing is, is said to be f / 4 and the other says f / 8. Can someone explain what this means? Moreover, what each of these telescopes is more appropriate to look?
I'm going to make things easy: get the XT6. The table on one side without a Dobs "are, without exception, not worth bothering with. The difference in focal ratio (f / 4 vs f8) describes the difference in the proportion the opening and the length of the tube. A shorter (lower) makes the shorter focal ratio of the tube but worse for many optical aberrations. A f / 8 coma (a distortion in particular) is almost a theme, but not f / 4 is very serious. It also means you have to be much more demanding of collimation (difficult for a beginner) and also need shorter focal length eyepiece (usually with poor eye relief) for the same increase. If they have the same price and portability is not the first consideration the decision is a no brainer.
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Orion Observer 70mm Altazimuth Refractor Telescope List Price: $139.95 Sale Price: $139.95 Average Rating: |
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Our Observer 70 is the perfect telescope for that budding astronomer in your family. This scope excels in both quality and performance. Its 70mm multi-coated achromatic objective lens - focal length 700mm focal length (f/10) - gathers 36% more light than a 60mm... |
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Orion Transporter 70mm Min-EQ Refractor Telescope List Price: $159.95 Sale Price: $159.95 |
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Treat your family or yourself to this compact, easy-to-use telescope. The Transporter is a nifty "short-tube" 70mm refractor that rides on our ultra-portable Min-EQ "tabletop" equatorial mount. This scope sweeps up tons of stars and is the perfect size for stashing in the car trunk for family camping trips... |
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Orion AstroView 120ST EQ Refractor Telescope List Price: $539.95 Sale Price: $539.95 Average Rating: |
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Our AstroView 120ST is a compact, rich-field refractor designed for observation of nebular clouds, star clusters, and even galaxies. Its multi-coated achromatic objective lens has a 120mm (4.7") clear aperture and has a focal length of just 600mm (f/5)... |
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Orion ShortTube 80 OTA List Price: $119.95 Sale Price: $119.95 |
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This version of the popular ShortTube 80 is sold without accessories. It is ideal for use as a guide scope with a CCD autoguider. All air-to-glass surfaces are now fully multicoated, ensuring maximum light transmission for enhanced brightness and clarity... |
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Meade Personal Solar Telescope List Price: $499.00 Sale Price: $499.00 Average Rating: |
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Coronado PST (Personal Solar Telescope) the little scope with the BIG image they said it could'nt be done. In response to requests for an entry price hydrogen alpha telescope, Coronado is pleased to announce PST... |
vivitar telescope
March 4th, 2010
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Microfiber Lens Cleaning Cloths Clean Camera Lenses, Computer Monitors, Lcds & Tv Screens, Handhelds, Pdas, Cell Phones, Iphones, Blackberries, Digital Cameras, Jewelry, Eyeglasses, Sunglasses, Cds, Dvds, Notebooks, Laptops, Telescopes, Binoculars, Ipads, Gps, Rear-view Mirrors, 6 x 7 Inches, Tropical Collection, 4-pack List Price: $35.80 Sale Price: $23.95 |
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Photosilk microfiber cleans eyeglasses, sunglasses, cameras & lenses, LCD screens, CDs & DVDs, iPods, smart phones, Blackberries, iPads, GPS, Computer & TV monitors, Car rear-view mirrors, binoculars, telescopes, watches and jewelry... |
Blurriness Vivitar Telescope?
I have the Vivitar telescope and last night i was using it and i could see the moon perfectly but the picture was blurry i could kinda see each crater in the moon but it was very blurry, i tried wiping each lens of the telescope but it was still blurry. Is there any solution or cloth material i could clean it with so its not blurry?
Vivitar telescopes are very poor quality and nearly all plastic. All the cleaning in the world will not solve the problem of poor quality and bad design flaws. You have probably reached the limits of your scope.
There are several different kinds of telescopes and all of them have some excellent features. Refractors and Reflectors, plus Schmidt-Cassegrain, APO refractors and more. There are also several mounts to chose from and the mounts are just as important as the scope is. All of the different scopes and mounts have some features that some people like and do not like.
There is no one scope that is "better" than another except for the junk scopes out there, Vivitar being one of the many brands of junk, and all junkers are just a waste of money. Never, ever buy from Walmart, Costco, Target, or any other discount store like that. Junk scopes are flooded into the market from those stores. You will be buying nothing but bad optics and plastic.
______________________________________...
http://oriontelescopes.com/
Orion is the very best for value and for customer service too. I have 2 of their scopes and I will only buy from them from now on.
The Orion site has some excellent diagrams and explanations of all types of scopes and mounts.
Things to consider are size--can the user lift and transport the scope to the viewing site easily? If not, then it will gather dust in a closet. Can the viewer reach all the knobs and buttons? I have a long tube large manual refractor and it is very dificult for me to reach the knobs when I am pointed to Zenith. I am not a tall person.
Take your time in making your decision.
I would like to suggest that you join a local astronomy club or astronomical society BEFORE you spend your money on a scope. There are many different kinds of scopes and what is perfect for one person is not perfect for another. Everyone has their own set of eyeballs and no two are the same. If you join a club, you can attend a few of their star parties and try out members scopes to see what works best for YOU, before you buy a scope. The members can also help you when you get your scope and show you how to get the most out of your new scope as well as to help teach you where the treasures in the sky are located. Hint: they will be especially helpful if you take cookies to star parties. Most clubs have loaner scopes and extensive libraries that you can gather more information from too.
Some people will suggest that you purchase binnoculars. Not a bad idea but dont buy anything less than 10x50 and you must have a tripod too or you will not be happy with your astronomical views because they will be too shakey from your movements. Personally, I prefer a scope to binos because if binoculars are not aligned properly at the factory, then you get double images and distortions that cant be fixed.
But when you buy go Orion and you wont be disappointed. Don't try to learn everything all at once or you will be overwhelmed and discouraged. Patience is the key to Astronomy.
You will also need a good star chart program.
http://www.stellarium.org/
This is great freeware that you can download. Just tell it where you are and it will tell you what you see.
I wish you all the best. Enjoy
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 Vivitar Tele View 60 120X Promo Telescope TEL 50600 NEW  US $29.95
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 Vivitar 1607225 50X 100X Refractor Telescope w tripod US $21.99
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 Telescope Vivitar with Tripod US $30.00
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 Vivitar E01046 Telescope US $25.00
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 Vivitar Refractor Telescope with Full Tripod NEW US $19.99
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 Vivitar Telescope Tripod 4X30 BinocularsCleaning kit US $39.99
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 Vivitar 60x 120 Refractor Telescope Silver Black NIB US $34.49
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 VIVITAR 50x 100x REFRACTOR TELESCOPE TRIPOD NIB $79 US $15.99
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 Vivitar Telescope with Tripod US $14.87
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 Vivitar 50x 100x Refractor Telescope W Tripod In Box US $19.99
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 Vivitar 50X 100X Refractor Telescope w Tripod Eyepiece US $62.69
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 Vivitar 60x 120x Telescope with 3x Scope and Tripod US $39.00
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 NEW Vivitar 50x 100x Refractor Telescope With Tripod US $49.99
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 NEW Vivitar 50x 100x Refractor Telescope Tripod GIFT US $24.99
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 Vivitar 50x 100x Refractor telescope with tripod New US $10.50
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Vivitar VIV-TEL-50600 60x/120x Telescope with Tripod and 4x30 Binoculars Plus deluxe Cleaning Kit Sale Price: $24.99 |
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Telescope Features: Built-In Eyepiece. Magnification: 120.0. Focal Length: 600.0 mm. Objective Lens Size: 46.0 mm. Lens Coating: Coated. Mount Type: Tripod. Includes: Eyepieces, Tripod, Eyepiece Storage Cases... |
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Vivitar 60x/120x Refractor Telescope - Silver/Black (VIV-TEL-50600) List Price: $29.99 Sale Price: Too low to display |
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Theres nothing like the first time your little one looks at the stars up close. This holiday season you can give that gift with this powerful Vivitar telescope. It features 60x and 120x eyepiece lenses, a 3x finder to locate objects faster, and a mirrored diagonal eyepiece for the ultimate easy viewing... |
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Microfiber Lens Cleaning Cloths Clean Camera Lenses, Computer Monitors, Lcds & Tv Screens, Handhelds, Pdas, Cell Phones, Iphones, Blackberries, Digital Cameras, Jewelry, Eyeglasses, Sunglasses, Cds, Dvds, Notebooks, Laptops, Telescopes, Binoculars, Ipads, Gps, Rear-view Mirrors, 6 x 7 Inches, Tropical Collection, 4-pack List Price: $35.80 Sale Price: $23.95 |
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Photosilk microfiber cleans eyeglasses, sunglasses, cameras & lenses, LCD screens, CDs & DVDs, iPods, smart phones, Blackberries, iPads, GPS, Computer & TV monitors, Car rear-view mirrors, binoculars, telescopes, watches and jewelry... |
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Celestron SkyScout ® Personal Planetarium ® and Celestron Firstscope ® Telescope and Sky Chart Sale Price: $299.00 |
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* Celestron SkyScout Personal Planetarium identifies celestial objects instantly with the click of a button. * Locates over 6,000 stars, planets and constellations from built-in celestial database and provides scientific information for each object... |
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Merchsource 1607225 Vivitar Telescope Sale Price: $19.99 Average Rating:  |
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Vivitar Telescope with Tripod List Price: $79.99 Sale Price: $13.88 Average Rating:  |
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From Vivitar. Telescope includes adjustable full-sized tripod, Mirrored diagonal eyepiece for easy viewing, Interchangeable 50x and 100x eyepiece lenses with storage cases, 3x finder scope to locate objects faster, Lightweight durable aluminum barrel, lens cap. |
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Microfiber Lens Cleaning Cloths Clean Camera Lenses, Computer Monitors, Lcds & Tv Screens, Handhelds, Pdas, Cell Phones, Iphones, Blackberries, Digital Cameras, Jewelry, Eyeglasses, Sunglasses, Cds, Dvds, Notebooks, Laptops, Telescopes, Binoculars, Ipads, Gps, Rear-view Mirrors, 6 x 7 Inches, Wild Cub Collection, 4-pack List Price: $35.80 Sale Price: $23.95 |
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Photosilk microfiber cleans eyeglasses, sunglasses, cameras & lenses, LCD screens, CDs & DVDs, iPods, smart phones, Blackberries, iPads, GPS, Computer & TV monitors, Car rear-view mirrors, binoculars, telescopes, watches and jewelry... |
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Microfiber Lens Cleaning Cloths Clean Camera Lenses, Computer Monitors, Lcds & Tv Screens, Handhelds, Pdas, Cell Phones, Iphones, Blackberries, Digital Cameras, Jewelry, Eyeglasses, Sunglasses, Cds, Dvds, Notebooks, Laptops, Telescopes, Binoculars, Ipads, Gps, Rear-view Mirrors, 6 x 7 Inches, Travel & Boat Collection, 4-pack List Price: $35.80 Sale Price: $23.95 |
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Photosilk microfiber cleans eyeglasses, sunglasses, cameras & lenses, LCD screens, CDs & DVDs, iPods, smart phones, Blackberries, iPads, GPS, Computer & TV monitors, Car rear-view mirrors, binoculars, telescopes, watches and jewelry... |
Refractor Telescope
February 16th, 2010
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What Are Binocular Telescopes?
Are you wondering what are binocular telescopes? What benefit do they serve? Will they replace reflector telescopes or even refractors? Find out more about binocular telescopes in this article, and some information on how you would buy one. In this article, you will soon discover: * What are binocular telescopes? * What are the benefits of binocular telescopes? * Where can you buy binocular telescopes? * Some advice for binocular telescopes * What are binocular telescopes? Binocular telescopes are a recent backyard astronomy thing! They have become more popular as more people have been seeking to break through the boundaries of telescopes. A binocular telescope is exactly what it says it is. First you will find that it is a telescope! In most cases it is a refractor telescope, and in fact, it is 2 telescopes joined together! * What are the benefits of binocular telescopes? There are several benefits of binocular telescopes, however for the most part they are real luxuries, as it requires 2 telescopes! The main point of a telescope is its light gathering abilities, and the benefit of binocular telescopes is that in effect you get double if not more light gathering abilities! When you consider that both your eyes can get the same amount of light for each, something special happens. Users report that it creates like a stereo image, where objects don't look flat, but start to have a dimension such as appearing 3d. Another aspect is that some people have reported that they have seen slight color when viewing the planets. This could be because they have a large enough area of light gathering that is allows seeing the colors of the planets! * Where can you buy binocular telescopes? You won't find binocular telescopes everywhere. Finding a good reflector or refractor is hard enough finding, let alone binocular telescopes! However it is possible and there are options. There are some great manufacturers who are hobbyists that turned into making these big binocular telescopes for sale to others. They usually make to order, but you know you are getting something worthy and unique! * Some advice for binocular telescopes Finding a telescope store selling these jumbo telescopes is going to be hard to find. However, going online is a big option and one which can bring about several manufacturers. Another option is to build it yourself, and there are many options to building big binocular telescopes. The first obvious thing is that you will need 2 telescopes. Either refractors or reflectors. I suggest if you are going to build binocular telescopes yourself, then consider refractors as they are easier to work with. You will need to align them so they both meet your eyes and can be seen by both your eyes. The result can be immense, and can look amazing having a mammoth style binocular telescope in your backyard!
About the Author
To see these binoculars visit these links for binocular telescopes and find telescope binoculars. Visit www.buytelescope.co.uk
I am looking for pdf file of the galileo refractor telescope owners manual?
Unless you know the manufacturer and/or model number, how would find the manual for it?
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 Meade NG 70 70mm Altazimuth Refractor Telescope NEW US $74.99
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 BARSKA Magnus ED 390X65 Refractor Telescope w Hard Case US $474.99
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 Barska 70060 StarWatcher Refractor Telescope AE10750 US $25.00
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 Stellarvue SVR70ED Refractor Telescope NEW US $449.00
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 Bushnell 420 x 60 Refractor Telescope NIB $8900 US $35.00
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 Telescope Bushnell 78 9500 60mm Refractor US $48.95
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 New White 50mm Refractor Telescope with Tripod w Mount US $20.50
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 Celestron 21061 AstroMaster 70 AZ Refractor Telescope US $85.00
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 New 910 x 60mm Refractor Telescope Tripod Software US $69.99
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 Telescope Skywatcher 120 EQ Equatorial Refractor US $500.00
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 New Black 60mm Refractor Telescope Tripod Software US $69.99
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 Emerson Refractor Telescope 50x 100x US $15.00
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 New White 70mm Refractor Telescope w Tripod and Extras US $149.99
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 BARSKA REFRACTOR TRAVEL TELESCOPE W Tripod Soft Case US $59.99
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 Meade NG 60 60mm refractor complete telescope NEW US $39.95
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 80mm Guide or Spotting Scope Refractor Telescope US $2.25
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Vivitar 1607225 50X 100X Refractor Telescope w tripod US $21.99
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 Stellarvue 80mm ED Refractor Telescope with Case US $152.55
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 Celestron NexStar 60 SLT 60mm Refractor Telescope US $179.00
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 New Black 50mm Refractor Telescope with Tripod w Mount US $59.99
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Vivitar Refractor Telescope with Full Tripod NEW US $19.99
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 350x50 Refractor Bushnell Telescope 181561 NIB US $27.95
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 Celestron 70mm Refractor Telescope Tube w Finder NEW US $29.99
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 Meade 60mm Refractor Telescope Tube or Guide Scope US $12.95
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 NEW PINK 16 40x 80mm REFRACTOR TELESCOPE f 5 KID GIFT US $99.99
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 Tasco luminova 660 power refractor telescope US $89.00
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 Tasco Novice 30050312 50mm 197 Refractor Telescope US $29.95
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 Galileo 800mm 72mm Refractor Telescope CC 872 US $119.99
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 New 400 x 80mm Table Top Refractor Telescope Tripod US $149.99
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 New Black 625 x 50mm Refractor Telescope Tripod US $49.99
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 Beginners Refractor Telescope with Tripod US $42.79
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 Vintage Tasco Astronomical Refractor Telescope 6TE 5 US $49.99
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 Celestron PowerSeeker 80mm EQ Refractor Telescope 21048 US $143.95
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 Emerson Refractor Telescope W A 4FT Adjustable Tripod US $19.99
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Vivitar 60x 120 Refractor Telescope Silver Black NIB US $34.49
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 Unitron Telescope Refractor Newton Highlands MA Ad1969 US $6.00
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 Unitron Telescope Refractor Newton Highlands MA Ad1963 US $6.00
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 Carson Jc 1000 Skyseekertm Refractor Telescope US $60.99
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 Galileo CC 2 700 x 60mm Refractor Telescope US $73.94
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 New 500 x 70mm Refractor Telescope Tripod Software US $139.99
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 Meade LXD75 AR 6AT 6 Achromatic Refractor Telescope US $1,199.00
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 Celestron AstroMaster 90 AZ Refractor Telescope 21063 US $199.90
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 MONOCULAR REFRACTOR ASTRONOMICAL TELESCOPE TRIPOD 70MM US $95.54
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 NEW Celestron Omni XLT 102mm Refractor Telescope SALE US $428.90
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 New 625 x 50mm Refractor Telescope Tripod Software US $49.99
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 New Black 910 x 60mm Refractor Telescope Tripod US $92.99
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 William Optics Megrez 90mm Apo Refractor Telescope OTA US $1,199.00
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 Celestron PowerSeeker 50AZ 50mm Refractor Telescope US $73.45
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 EMERSON 50X 100X REFRACTOR TELESCOPE W TRIPOD US $17.95
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 Tasco Tasco 49tn Refractor Telescope And Microscope 49T US $37.99
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 Meade DS 2080AT TC 31 80mm Refractor Telescope Kit US $276.99
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 Carson Mtel 50 Aimtm Table top Refractor Telescope US $41.67
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 Astronomical Refractor Telescope Kit for Kids Beginners US $68.18
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 Vixen ED 80 SF Refractor Telescope 2617 US $479.00
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 New Pink 50mm Refractor Telescope with Tripod w Mount US $59.99
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 New Blue 80mm GPS Computerized Refractor Telescope US $374.99
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 Vixen ED100Sf 100mm f 90 Refractor Telescope OTA US $999.00
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 Vixen A70Lf 70mm Refractor Telescope Porta II Mount US $399.00
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 Vixen A70Lf 70mm Refractor Telescope Mini Porta Mount US $299.00
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 Vixen A70Lf 70mm f 129 Achromatic Refractor Telescope US $139.00
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Celestron 21061 AstroMaster 70 AZ Refractor Telescope List Price: $129.95 Sale Price: $86.74 Average Rating:  |
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If you're looking for a dual-purpose telescope appropriate for both terrestrial and celestial viewing, then the AstroMaster Series is for you. Each AstroMaster model is capable of giving correct views of land and sky. |
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Celestron 21062 AstroMaster 70 EQ Refractor Telescope List Price: $237.95 Sale Price: $149.95 Average Rating: |
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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... |
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TASCO 49TN Refractor Telescope & Microscope List Price: $59.99 Sale Price: $21.83 Average Rating: |
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50 x 50mm table telescope & 900x microscope Refractor telescope is ideal for land or sky viewing for the young observer 19-piece microscope kit includes assorted examination slides, preparation tools & sample slides |
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Meade NG-70SPR Altazimuth Refractor Telescope - Silver (20215) List Price: $119.99 Sale Price: $67.95 Average Rating: |
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Meade Engineers have thoroughly updated the traditional entry-level telescope with a simple manual altazimuth mount designed for easy land use with occasional peaks at the sky to a new standard for the 21st Century... |
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ETX-80AT Astro Telescope w/ Tripod & Autostar Controller List Price: $299.99 Sale Price: $249.00 Average Rating: |
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Explore the Galaxies far away, or the wildlife in this one, all at the touch of a button, with this fantastically priced, all-inclusive telescope. Now even the most novice of amateur astronomers can locate and explore the planets, asteroids, and comets, as well as nebulae, star clusters, galaxies, and hundreds of other deep-space objects, all at the push of a button with the included Autostar Hand Controller... |
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Pink TwinStar AstroMark 50mm 75x Power Refractor Telescope Sale Price: $54.99 |
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Here is our best value, full-featured telescope. This simple to assemble and easy to use refractor telescope will amaze and astonish you with its outstanding views of the Moon, Saturn's Rings and plenty of deep-space objects such as the Beehive star clusters, the Orion Nebulae and binary star systems... |
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Fun with telescopes List Price: $2.99 |
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Has The Night Sky Always Fascinated You Since You Were A Child? Do You Often Wonder What Lies Beyond The Dark Expanse Above? Do You Want To Fathom The Mysteries Of The Infinite Universe?At Last! A Guide That Explains Astronomy And Telescopes In Layman's Language, Leaving All The Technical Jargon Out! Understand The Basics Of Astronomy And Telescopes... |
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Choosing and Using a Refracting Telescope (Patrick Moore's Practical Astronomy Series) List Price: $34.95 Sale Price: $30.69 |
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Choosing and Using a Refracting Telescope has been written for the many amateur astronomers who already own, or are intending to purchase, a refracting telescope â perhaps to complement their existing arsenal of larger reflecting telescopes â or for the specialist who requires a particular refractor for serious astronomical applications... |
refractor telescope
February 8th, 2010
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How Newton’s Telescope Changed the World
Sir Isaac Newton is often considered as the greatest Astronomer and Mathematician to ever live. There is a lot of validity to this claim. This article looks at his famous reflector telescope and describes some of his discoveries.
A reflector telescope is one that uses a mirror rather than lenses to bend light and magnify images. Reflector telescopes, because they are easier to make and can be made in sizes much larger than refractors, are an invention that changed astronomy and our understanding of the universe. The largest refractor telescope in the world is forty inches in diameter and reflector telescopes dwarf this in comparison. There are currently several reflector type scopes that are over four hundred inches in diameter.
Why a reflector is better than a refractor
If you are familiar with a prism or a rainbow you can understand why reflectors are superior to refractors. When light passes through glass the different bands (or colors) pass through at different angles and this causes aberrations or problems in the images. This is called chromatic aberration and it gives us distorted views of what we see through a lens. In the time of Newton glass making and lens making was very primitive and the problems of chromatic aberration were not yet overcome. Today we can make lenses that have almost no chromatic aberration but we can’t make them very large. When a lens gets to be really large it gets very heavy and its own weight will distort the lens and ruin the image.
Newton’s telescope solved these problems. A mirror doesn’t pass light through it. It simply bounces all the light off the surface. There is no chromatic aberration at all. And because you only need to bounce light off the surface you can place the whole mirror on a supporting structure or base which takes a lot of the weight off the mirror. This way you can build much larger mirrors without any distortion.
It is commonly thought that Newton invented the first reflector telescope but it isn’t true. Credit for making the first reflector goes to and Italian Monk, Physicist, and Astronomer named Niccolo Zucchi. He published a book on Optics in the 1650’s and it is this book that inspired Sir Isaac Newton to build his own telescope. Zucchi created his first reflector around 1616 while Newton completed his first (and famous) telescope in 1670. But while Zucchi did make some new discoveries with his telescope it didn’t work well and was difficult to make and to use. It was Newton’s telescope that worked really well and that brought the art and science of reflectors into the world of science.
The real genius of Newton’s Telescope
All of that stuff is remarkable but there is something much more important in Newton’s Astronomy and in his telescope. He didn’t after all, discover moons around Jupiter like Galileo did, or plot the return of a comet like Halley did. But what he did do was tie in Mathematics, Astronomy, and our understanding of the universe using his telescope and his theory of universal gravitation. He proved mathematically that gravitation was a two way operation and that while the earth pulled on a falling apple so the apple too pulled on the earth. This was clearly seen, calculated, and confirmed in the motions of heavenly bodies which was refined and made possible by the new science of reflector telescopes which we can credit to Newton.
Sir Isaac and his telescope carried on with the work of Copernicus and Galileo by furthering our understanding of the universe we live in and helping us to realize there are laws that govern the whole of the universe. And this rule holds true for falling apples and for planets revolving around stars.
The actual telescope that Newton built still survives today and is in the care of the Royal Society of London. They keep it on display in London and sometimes it travels the world as part of an exhibit.
About the Author
Want to learn more about telescopes? Visit the Telescope Nerd:
TelescopeNerd.com
What's the difference between a reflector, refractor, and computerized telescope?
a refractor has an objective lense at one end and an eyepiece at the other. The light from an object passes through the objective lense, is focused upon the eyepiece, which focuses the image for your eye.
A reflector uses a mirror to gather light, then focus it on an eyepiece which focuses the image for your eye.
A computerized telescope is merely one which uses input on a keypad to point the telescope at the object you want to view. The computer usually has a list of thousands of stars, planets, galaxies, etc to which it can be pointed. The computerized scopes have to be pre-aimed at a couple of points in the sky, unless they are equipped with gps capability. In that case, you set up the scope, tell it to point at Jupiter and it will move to point at Jupiter (assuming that Jupiter is above the horizon.)
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Meade NG 70 70mm Altazimuth Refractor Telescope NEW US $74.99
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BARSKA Magnus ED 390X65 Refractor Telescope w Hard Case US $474.99
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Barska 70060 StarWatcher Refractor Telescope AE10750 US $25.00
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Stellarvue SVR70ED Refractor Telescope NEW US $449.00
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Bushnell 420 x 60 Refractor Telescope NIB $8900 US $35.00
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Telescope Bushnell 78 9500 60mm Refractor US $48.95
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New White 50mm Refractor Telescope with Tripod w Mount US $20.50
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Celestron 21061 AstroMaster 70 AZ Refractor Telescope US $85.00
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New 910 x 60mm Refractor Telescope Tripod Software US $69.99
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Telescope Skywatcher 120 EQ Equatorial Refractor US $500.00
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New Black 60mm Refractor Telescope Tripod Software US $69.99
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Emerson Refractor Telescope 50x 100x US $15.00
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New White 70mm Refractor Telescope w Tripod and Extras US $149.99
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BARSKA REFRACTOR TRAVEL TELESCOPE W Tripod Soft Case US $59.99
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Meade NG 60 60mm refractor complete telescope NEW US $39.95
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80mm Guide or Spotting Scope Refractor Telescope US $2.25
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Vivitar 1607225 50X 100X Refractor Telescope w tripod US $21.99
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Stellarvue 80mm ED Refractor Telescope with Case US $152.55
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Celestron NexStar 60 SLT 60mm Refractor Telescope US $179.00
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New Black 50mm Refractor Telescope with Tripod w Mount US $59.99
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Vivitar Refractor Telescope with Full Tripod NEW US $19.99
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350x50 Refractor Bushnell Telescope 181561 NIB US $27.95
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Celestron 70mm Refractor Telescope Tube w Finder NEW US $29.99
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Meade 60mm Refractor Telescope Tube or Guide Scope US $12.95
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NEW PINK 16 40x 80mm REFRACTOR TELESCOPE f 5 KID GIFT US $99.99
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Tasco luminova 660 power refractor telescope US $89.00
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Tasco Novice 30050312 50mm 197 Refractor Telescope US $29.95
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Galileo 800mm 72mm Refractor Telescope CC 872 US $119.99
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New 400 x 80mm Table Top Refractor Telescope Tripod US $149.99
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New Black 625 x 50mm Refractor Telescope Tripod US $49.99
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Beginners Refractor Telescope with Tripod US $42.79
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Vintage Tasco Astronomical Refractor Telescope 6TE 5 US $49.99
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Celestron PowerSeeker 80mm EQ Refractor Telescope 21048 US $143.95
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Emerson Refractor Telescope W A 4FT Adjustable Tripod US $19.99
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Vivitar 60x 120 Refractor Telescope Silver Black NIB US $34.49
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Unitron Telescope Refractor Newton Highlands MA Ad1969 US $6.00
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Unitron Telescope Refractor Newton Highlands MA Ad1963 US $6.00
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Carson Jc 1000 Skyseekertm Refractor Telescope US $60.99
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Galileo CC 2 700 x 60mm Refractor Telescope US $73.94
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New 500 x 70mm Refractor Telescope Tripod Software US $139.99
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Meade LXD75 AR 6AT 6 Achromatic Refractor Telescope US $1,199.00
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Celestron AstroMaster 90 AZ Refractor Telescope 21063 US $199.90
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MONOCULAR REFRACTOR ASTRONOMICAL TELESCOPE TRIPOD 70MM US $95.54
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NEW Celestron Omni XLT 102mm Refractor Telescope SALE US $428.90
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New 625 x 50mm Refractor Telescope Tripod Software US $49.99
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New Black 910 x 60mm Refractor Telescope Tripod US $92.99
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William Optics Megrez 90mm Apo Refractor Telescope OTA US $1,199.00
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Celestron PowerSeeker 50AZ 50mm Refractor Telescope US $73.45
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EMERSON 50X 100X REFRACTOR TELESCOPE W TRIPOD US $17.95
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Tasco Tasco 49tn Refractor Telescope And Microscope 49T US $37.99
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Meade DS 2080AT TC 31 80mm Refractor Telescope Kit US $276.99
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Carson Mtel 50 Aimtm Table top Refractor Telescope US $41.67
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Astronomical Refractor Telescope Kit for Kids Beginners US $68.18
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Vixen ED 80 SF Refractor Telescope 2617 US $479.00
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New Pink 50mm Refractor Telescope with Tripod w Mount US $59.99
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New Blue 80mm GPS Computerized Refractor Telescope US $374.99
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Vixen ED100Sf 100mm f 90 Refractor Telescope OTA US $999.00
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Vixen A70Lf 70mm Refractor Telescope Porta II Mount US $399.00
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Vixen A70Lf 70mm Refractor Telescope Mini Porta Mount US $299.00
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Vixen A70Lf 70mm f 129 Achromatic Refractor Telescope US $139.00
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Meade NG-70SPR Altazimuth Refractor Telescope - Silver (20215) List Price: $119.99 Sale Price: $67.95 Average Rating: |
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Meade Engineers have thoroughly updated the traditional entry-level telescope with a simple manual altazimuth mount designed for easy land use with occasional peaks at the sky to a new standard for the 21st Century... |
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ETX-80AT Astro Telescope w/ Tripod & Autostar Controller List Price: $299.99 Sale Price: $249.00 Average Rating: |
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Explore the Galaxies far away, or the wildlife in this one, all at the touch of a button, with this fantastically priced, all-inclusive telescope. Now even the most novice of amateur astronomers can locate and explore the planets, asteroids, and comets, as well as nebulae, star clusters, galaxies, and hundreds of other deep-space objects, all at the push of a button with the included Autostar Hand Controller... |
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Pink TwinStar AstroMark 50mm 75x Power Refractor Telescope Sale Price: $54.99 |
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Here is our best value, full-featured telescope. This simple to assemble and easy to use refractor telescope will amaze and astonish you with its outstanding views of the Moon, Saturn's Rings and plenty of deep-space objects such as the Beehive star clusters, the Orion Nebulae and binary star systems... |
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Celestron 21061 AstroMaster 70 AZ Refractor Telescope List Price: $129.95 Sale Price: $86.74 Average Rating: |
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If you're looking for a dual-purpose telescope appropriate for both terrestrial and celestial viewing, then the AstroMaster Series is for you. Each AstroMaster model is capable of giving correct views of land and sky. |
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Celestron 21062 AstroMaster 70 EQ Refractor Telescope List Price: $237.95 Sale Price: $149.95 Average Rating: |
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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... |
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TASCO 49TN Refractor Telescope & Microscope List Price: $59.99 Sale Price: $21.83 Average Rating: |
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50 x 50mm table telescope & 900x microscope Refractor telescope is ideal for land or sky viewing for the young observer 19-piece microscope kit includes assorted examination slides, preparation tools & sample slides |
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Fun with telescopes List Price: $2.99 |
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Has The Night Sky Always Fascinated You Since You Were A Child? Do You Often Wonder What Lies Beyond The Dark Expanse Above? Do You Want To Fathom The Mysteries Of The Infinite Universe?At Last! A Guide That Explains Astronomy And Telescopes In Layman's Language, Leaving All The Technical Jargon Out! Understand The Basics Of Astronomy And Telescopes... |
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Choosing and Using a Refracting Telescope (Patrick Moore's Practical Astronomy Series) List Price: $34.95 Sale Price: $30.69 |
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Choosing and Using a Refracting Telescope has been written for the many amateur astronomers who already own, or are intending to purchase, a refracting telescope â perhaps to complement their existing arsenal of larger reflecting telescopes â or for the specialist who requires a particular refractor for serious astronomical applications... |
Telescope Porta Mount
January 30th, 2010
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 Vixen R130Sf 130mm f 5 Telescope Porta II Mount US $499.00
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 Vixen VMC110L 110mm f94 Telescope Porta II Mount US $499.00
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 Vixen VMC95L 95mm f 11 Telescope Mini Porta Mount US $359.00
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Vixen A70Lf 70mm Refractor Telescope Porta II Mount US $399.00
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Vixen A70Lf 70mm Refractor Telescope Mini Porta Mount US $299.00
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Vixen 5863 Porta II Mount for Telescope List Price: $319.00 Sale Price: $319.00 |
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For so many years the beginning astronomer was forced to buy a mount that was unstable and almost useless when viewing at high power. More often than not, the frustration of using an unstable mount resulted in the telescope only being used for one night and being left in a closet to collect dust... |
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Vixen 3992mini Mini Porta Mount List Price: $199.00 Sale Price: $198.95 Average Rating:  |
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The Vixen VMC95L, is a 95mm (3.7 inch) aperture modified Cassegrain f/11 optical tube assembly. The VMC95L features a curved vane Secondary Mirror Spider to reduce diffraction effects. Like its larger cousins the VMC110L, VMC200L and VMC260L, this scope features a meniscus lens just ahead of the Secondary Mirror... |
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Vixen 33923 VMC95L Telescope and Mini Porta Mount List Price: $359.00 Sale Price: $359.00 |
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The Vixen VMC95L is a 95 mm (3.7") aperture modified Cassegrain f/11 optical tube assembly. It features a curved vane Secondary Mirror Spider to reduce diffraction effects. Like its larger cousins the VMC110L, VMC200L and VMC260L, this scope features a meniscus lens just ahead of the Secondary Mirror... |
Refractor Telescope Focuser
January 3rd, 2010
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A Guide For First Time Telescope Buyers
For starters, this guide is going to help answer a few of the questions that might be floating in your head as a first time telescope buyer. The internet has granted us unlimited access to some of the best astronomy information in existence, make use of it!
What different types of telescopes are there?
There are, typically, two types of telescopes on the market. The first type of telescope and typically the most effective for viewing planetary bodies is the refractor telescope. Refractor telescopes use lenses to magnify the image of space and bring it to your eye at an eye piece at the base of the telescope. The second type of telescope, which is found to be more effective for viewing deep space, is the reflector telescope. Reflector telescopes use a mirror technology first invented by Isaac Newton. Rather than use lenses to magnify the light waves, a parabolic mirror is used to reflect the image into a focus point and then reflected into an eyepiece that runs along the side of the telescope.
Which type of telescope is right for me?
Most beginner astronomers would likely start with a refractor telescope. The amount of maintenance and care that is needed to be given to this type of telescope is a lot less. A reflector telescope might need more care and maintenance, but it will prove to be more effective in the long run. One thing to keep in mind is your usage for these telescopes. If you plan to take your telescope camping and hiking, having something smaller and easier to travel with might be your deciding factor. Some astronomers are fortunate enough to have a great view of the skies from their own backyards, so having a top of the line telescope that doesn't need to travel much can be very effective for them.
Ok, but what about the cost?
There are very many high quality telescopes that can still fit into a budget. You might expect to pay somewhere between $100-200 for a telescope that fits the needs of any amateur astronomer. But keep in mind your increasing likeness toward this hobby. As with most products, the more money that you are willing to spend the better quality your telescope is going to be.
Refractor Telescopes are more travel-friendly, easier to use and maintain and very effective tools for viewing space. A great refractor might be the best choice for someone buying their first telescope.
Reflector Telescopes are going to be more effective at bringing all of the light and coloration to your eyes without distorting. They might be a bit bigger in size and might require more care and maintenance, but it's definitely worth the effort if you are getting serious about astronomy.
About the Author
Kirby Yardley is an expert astronomer. He shops at MagnifySpace.com!
Check out great deals on telescopes at MagnifySpace.com
help w/ telescope lens'?
I just got my first telescope its a Meade with a 2.8 inch aperature. It came with the following lens': 25mm, a 9mm, and a 2x Barlow.
I know the barlow lens doubles the smaller lens' magnifying power. I would like to know which lens can see the furthest. I have been using the 25 and the barlow together and don't know how far I can zoom in to see say Saturn. I don't know how well I will be able to see this planet. Will it be fuzzy or with my scope will it only be a shining mass in the mirror. Oh my telescope is a refractor. I just want to see the rings of Saturn, if the focuser is all the way out will it be clearer or not?
Oh thanks I have a focal length of 10
Magnification is focal length of the objective divided by focal length of the eyepiece. The Barlow basically increases the focal length of the objective by the specified factor (2x in your case). So you need to know the focal length of your objective. If it isn't in your manual you can get a rough number by just measuring how long the telescope is.
If you have the Meade 70AZ-AR, as shown in the source, then the focal length is 700 mm. So the 25 mm eyepiece gives 700/25= 28 power and the 9mm gives 700/9= 78 power. With the Barlow you get double the power, or 56 and 156.
By the way, magnification has nothing to do with how far you can see, only how big something appears. It isn't the same thing at all. Also, any magnification higher than 50 times the objective lens diameter in inches (50 * 2.8 = 140 in your case) is useless, so the 156 you get with the 9mm and Barlow is really pushing the limit; I suspect you will rarely use it.
The 78 power you get with the 9 mm eyepiece alone is more than enough power to see the rings of Saturn. It will look small, but you will see the rings clearly. You move the focuser to whatever position makes the image clear. That is what it is for, not for zooming in. To "zoom in" you just change eyepieces. There are some zoom eyepieces made, but you don't have one, so you just select one of the 4 possible combinations to get the magnification you want.
25 mm = 28x
25 mm + Barlow = 56x
9 mm = 78x
9 mm + Barlow = 156x
To find the location of Saturn in the sky, try the second source. Saturn is easily seen as a bright star in the sky without using any telescope, just your eyes. When you know which star is Saturn, point your telescope at it using the lowest power (28). Once it is in the field of view, carefully, without moving the telescope at all, change to a higher power eyepiece. You will probably have to re-focus after changing eyepieces. I suggest the 9mm, 78 power one for the best view of Saturn. Your telescope is really too small to get a sharp, crisp looking image at 156 power, but you can try it anyway if you like.
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Telescope Porta
November 20th, 2009
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Vixen 5863 Porta II Mount for Telescope List Price: $319.00 Sale Price: $319.00 |
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For so many years the beginning astronomer was forced to buy a mount that was unstable and almost useless when viewing at high power. More often than not, the frustration of using an unstable mount resulted in the telescope only being used for one night and being left in a closet to collect dust... |
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Vixen R130Sf 130mm f 5 Telescope Porta II Mount US $499.00
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Vixen VMC110L 110mm f94 Telescope Porta II Mount US $499.00
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Vixen VMC95L 95mm f 11 Telescope Mini Porta Mount US $359.00
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Vixen A70Lf 70mm Refractor Telescope Porta II Mount US $399.00
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Vixen A70Lf 70mm Refractor Telescope Mini Porta Mount US $299.00
|
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Vixen 5863 Porta II Mount for Telescope List Price: $319.00 Sale Price: $319.00 |
|
For so many years the beginning astronomer was forced to buy a mount that was unstable and almost useless when viewing at high power. More often than not, the frustration of using an unstable mount resulted in the telescope only being used for one night and being left in a closet to collect dust... |
|
Vixen 3992mini Mini Porta Mount List Price: $199.00 Sale Price: $198.95 Average Rating: |
|
The Vixen VMC95L, is a 95mm (3.7 inch) aperture modified Cassegrain f/11 optical tube assembly. The VMC95L features a curved vane Secondary Mirror Spider to reduce diffraction effects. Like its larger cousins the VMC110L, VMC200L and VMC260L, this scope features a meniscus lens just ahead of the Secondary Mirror... |
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Vixen 33923 VMC95L Telescope and Mini Porta Mount List Price: $359.00 Sale Price: $359.00 |
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The Vixen VMC95L is a 95 mm (3.7") aperture modified Cassegrain f/11 optical tube assembly. It features a curved vane Secondary Mirror Spider to reduce diffraction effects. Like its larger cousins the VMC110L, VMC200L and VMC260L, this scope features a meniscus lens just ahead of the Secondary Mirror... |
Refactor Telescope
September 4th, 2009
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Apo Refractor
August 28th, 2009
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if you already owned a 3 inch apo would you also get a 4 inch apo?
I have a 3 inch apo refractor and I am interested in also owning something with more aperture to complement the little scope. Is there a big enough difference in the 4 inch apo compared to the ed80, to justify the purchase? Or, should I save a few bucks and complement the ed80 with a ten inch dob? What would you do with a limited budget. Note: both apos are of the same brand and quality.
A 100mm Apo would be perfect for wide field Astrophotography, but so would an 80mm, which also has a wide field of view (depending on the focal length-usually f5-f6 or thereabouts).. They are both high quality, but you would be far better off buying a 10" Dob, it will be cheaper than a 100mm Apo and will give jaw dropping views of the planets, galaxies and many deep sky objects which need a high magnification. It will be difficult to take images through a Dob though without a special tracking mount for it.
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William Optics Megrez 90mm Apo Refractor Telescope OTA US $1,199.00
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 100MM SEMI APO TRIPLET REFRACTOR PROTOTYPE TELESCOPE US $399.99
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 Meade Series 5000 80mm ED Apo Refractor Telescope OTA US $649.00
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 42 inch F 66 Triplet ED APO refractor lensNEW US $695.00
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 IOPTRON VERSA 108 ED APO REFRACTOR OTA 378051 US $1,170.00
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Orion ED80 80mm f/7.5 Apo Refractor Telescope List Price: $499.95 Sale Price: $499.95 Average Rating: |
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I have been looking for quick "setup and go" telescope of superior quality for a few years, and I believe I have found that scope in the Orion 80ED. This is an amazingly compact, well performing little instrument that combines all the features I have been looking for in a single package... |
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Orion ED100 100mm f/9 Apo Refractor Telescope List Price: $679.95 Sale Price: $679.95 Average Rating: |
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You could pay $2,500 on up for a premium 4" refractor from one of those "boutique" telescope outfits. But here's something more practical. The Orion 10mm ED Apo is the most jaw-dropping value in high-end refractors ever offered... |
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Orion SkyView Pro ED100 EQ Apo Refractor Telescope List Price: $1,149.95 Sale Price: $1,149.95 |
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The refractor revolution continues at Orion with the SkyView Pro 100mm ED. It's a complete observing package featuring the ED100mm apochromatic refractor optical tube assembly paired with the venerable SkyView Pro equatorial mount/tripod -- at an unprecedented low price... |
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Be a Stargazer: A Guide to Astronomy List Price: $2.99 |
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CONTENTSCHAPTER PAGE1.Why Study Light? 42.Introduction To Light 53.Introduction To Color 104.Astronomical Instruments 145.Our Solar System 186.The Sun 207.Earth's Moon 228.Planets 279.Asteroids 6610.Meteoroids 6811... |
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BARSKA Magnus ED 390X65 Refractor Telescope with Hard Case List Price: $1,000.00 Sale Price: $474.99 |
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Barska Magnus 65ED Refractor Telescope pulls in planets and other heavenly bodies in breathtaking detail! One of the finest compact telescopes you'll find! The Barska Magnus 65ED Refractor Telescope's Extra Low Dispersion (ED) glass and multi-coated optics produce images that are sharp edge-to-edge with no chromatic aberration (also known as color fringing)... |
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BARSKA Magnus ED 560x80 Refractor Telescope with Hard Case List Price: $1,243.75 Sale Price: $599.99 |
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Barska Magnus 80ED Refractor Telescope pulls in planets and other heavenly bodies in breathtaking detail! One of the finest compact telescopes you'll find! The Barska Magnus 80ED Refractor Telescope's Extra Low Dispersion (ED) glass and multi-coated optics produce images that are sharp edge-to-edge with no chromatic aberration (also known as color fringing)... |