newtonian telescope
 |
Black 6" Newtonian Reflector Telescope 1400
List Price:  |
DescriptionBRAND NEW SHORT TUBE NEWTONIAN EQUATORIAL REFLECTOR TELESCOPE Diameter=150mm (6") - Focal point=750mm (30") and 1400mm (55") Full Coating = al+sio Clear aperture 6inches = 150mm Focal length 29.38inches = 750mm Focal ratio f/5 Mirror thickness 0.625inches = 16mm Thickness/diameter ratio 1:9.6 Surface Accuracy = 1/8. Using a barlow correcting lens, this almost doubles the 750 mm power, this makes it 1400 mm. The tripod is aluminum, fully adjustable and foldable with a very nice accessory tray to hold your telescope lenses and other accessories. This telescope is mounted on a fully functioning and precise equatorial mount. A counterweight, latitude scale, setting circles and slow motion controls on both axes are standard, so you have a fully loaded telescope right from the start. This mount is the most rigid and stable in its price range. It features precision worm gears for extremely smooth motion. Simple schematic of how the telescope works. Observe hundreds of galaxies, nebulae, and star clusters of all types your very first night out, and hundreds more the next night out, Simply by observing through your new telescope. Watch as the telescope moves effortlessly and smoothly from major planet to asteroid to galaxy to nebula with the flexible slow moving controls on each axis, placing every object in the center of the telescopic field. Study fine fault lines on the Moon, structural detail in Jupiter s cloud belts and Red Spot, the Cassini division in Saturn s rings, and much more. This is a discontinued model a major US known manufacturer. The factory is in China. We purchased the rest of the pulls from them.. They will come in a Generic box, Warranty is through us. Our agreement to them was not to disclose the Manufacturer name, this is why we were very specific with the specifications in the ad. Every thing you need, this is a complete kit, great for beginners and provides plenty of room for growth. S&H IS $10.50 Features
|
A Telescope Buying Guide for Beginners
Telescope is an exciting physics equipment. Buying a telescope is a daunting task for a newcomer. It all depends on your astronomy goals and careers. There is no perfect one which suits all observers in all conditions. You have to look for the features you want in your telescope and select the best one's according to your requirement.
Selecting the proper type
- The refractor type telescopes best suit for watching moon and major planets. Refractor telescopes are long & thin, and known for their sharp, detailed and contrasty images. They collect light through multi-element lenses. If you are just a starter then a small, quality achromatic refractor of 60 to 90 mm aperture would be a good one. The best thing about a refractor telescope is that they are inexpensive, portable and almost maintenance free. A refractor telescope is also useful when you will be mostly observing from city or the surrounding areas where the night skies are lightly polluted.
- Reflector telescopes are also known as Newtonian telescopes. They are good for planetary as well as deep-sky viewing. However Newtonian telescopes are more fragile and need more maintenance than others. These telescopes collect light with a curved, concave mirror and with the help of their large apertures, they show fine, highly-resolved images. The reflector scopes are not suitable for terrestrial viewing because they produce an upside-down image.
- Catadioptrics use both lenses and mirrors to collect and focus the incoming light. They are also called compound telescopes. Catadioptrics scopes are considered the most versatile telescopes and gives great all-around performance. They use a large aperture in very compact tubes. They show magnificent images of the moon, planets and faint deep-sky objects, when viewed in dark skies away from urban areas. These scopes are best suited for astrophotography. Compared to other two, these scopes have a wide range of accessories available. They can be entirely computer controlled.
Factors affecting the performance of a telescope
-
- Aperture: Telescopes collect light from distant objects and focus it to produce images. The light collecting capacity of a telescope is the most important feature. It is the aperture of scope (diameter of mirror or lens) that is responsible for gathering light. Larger the aperture, the more light gathered, the more you'll see.
- Telescope Mounts: There are three basic mounts for telescopes altazimuth, Dobsonian, or equatorial. Altazimuth is the simplest type of mount, providing up-down, left-right motions. It is mainly recommended for terrestrial viewing and casual stargazing. The Dobsonian mount was basically designed for easy maneuvering of large reflectors of more than six inches. It is a boxy altaz-type mount sitting close to the ground. Equatorial mounts are designed for the purpose of astronomical viewing. These mounts are more expensive and complicated than the altazimuth mounts. With the help of these type of mounts users can track or follow the motion of celestial objects through the sky with a single manual hand control.
- Magnification: Magnification should never top the priority for buying a telescope. The quality if image degrades with magnification. Practically 300X is maximum magnification for good quality images. Telescope's magnification is also known as its power and it is adjusted by changing eyepieces. Ideally there should have been three eyepieces for the magnification of a scope: one low, one medium and one high. Lower powers of 30 - 50X are recommended for observing galaxies, star clusters and nebulae as they are spread over a wide area of sky. For observing the rings of Saturn, Jupiter, studying craters and valleys of the Moon's surface medium power of 80 - 100X are advised. Higher powers of 150 - 200X allow the astronomers to observe mountain peaks and fine lunar detail, the surface features of Mars.
I am a laboratory analyst by profession working in this industry from last 10 years. I have been running a site http://www.laboratoryequipmentworld.com on laboratory equipments. It includes the largest range of laboratory apparatus and other updated info on market, trade fairs, news, etc.
About the Author
I am a laboratory analyst by profession working in this industry from last 10 years.I have been running a site www.laboratoryequipmentworld.com on laboratory equipments. It includes the largest range of laboratory apparatus and other updated info on market, trade fairs, news, etc.
Could you help me with collimating my Newtownian telescope?
I have a Newtonian reflector telescope that I'm practically scared to use, partly because I can't find a good, "Collimation For Idiots," comprehendable website and partly because nobody I know knows what the heck I'm talking about. Any tips, tricks, or recommended websites out there?
EDIT: There's a tool?
There are many resources on the web about this - just search for "Newtonian collimation". They say basically the same thing, just different wording, so you may prefer one over the other. Since this depends on your style, I won't give any specific web resource; you may try this one: http://skytonight.com/howto/diy/3306876.html
You may join a telescope-related newsgroup; in the Resources section, you are likely to find one or more collimating-related file.
Collimating can be done in several ways:
1. Without tools (looking through the center of the focuser tube, eventually using a peephole, to help you get the tube cneter)
2. Using simple conventionsl tools, such as a Cheshire eyepiece)
3. Using a laser collimator, probably the most expensive tool (50 to 80 USD, range is approximate), and some say that it is the most precise. Laser collimators usually come with instructions.
4. A simpler method is the barlowed laser collimation (search for "barlowed laser"); for this, you can improvise the tool with a laser pointer, and instead of a barlow, use one of the diffraction patterns supplied with the pointer; unlike the laser collimator, it does not need to be precisely aligned, it only needs to start in the center of the focuser tube.
 |
 NEW MAGNACRAFT® 76X 900X NEWTONIAN REFLECTOR TELESCOPE  US $139.95
|
 AUTOGRAPHED Celestron FirstScope 114 45 Newtonian Telescope US $399.00
|
 Bushnell Deep Space 78 9003 76mm Newtonian Telescope US $90.00
|
 Celestron SkyProdigy 130mm Newtonian Reflector Telescope 31153 US $699.00
|
 Celestron ExploraScope 80 80mm Newtonian Telescope US $20.50
|
 Galileo FS 85MOHDX 80mm Newtonian Telescope US $119.99
|
 114 mm EQUATORIAL NEWTONIAN REFLECTOR TELESCOPE 2011 US $299.99
|
 Celestron 114mm Newtonian Telescope w original wooden tripod US $72.00
|
 Celestron NexStar 4 GT 102mm Newtonian Telescope US $299.00
|
 VINTAGE EDMUND SCIENTIFIC 6 f 6 NEWTONIAN TELESCOPE W EQUATORIAL MOUNT EXTRAS US $299.95
|
|
Black 6" Newtonian Reflector Telescope 1400
List Price: |
DescriptionBRAND NEW SHORT TUBE NEWTONIAN EQUATORIAL REFLECTOR TELESCOPE Diameter=150mm (6") - Focal point=750mm (30") and 1400mm (55") Full Coating = al+sio Clear aperture 6inches = 150mm Focal length 29.38inches = 750mm Focal ratio f/5 Mirror thickness 0.625inches = 16mm Thickness/diameter ratio 1:9.6 Surface Accuracy = 1/8. Using a barlow correcting lens, this almost doubles the 750 mm power, this makes it 1400 mm. The tripod is aluminum, fully adjustable and foldable with a very nice accessory tray to hold your telescope lenses and other accessories. This telescope is mounted on a fully functioning and precise equatorial mount. A counterweight, latitude scale, setting circles and slow motion controls on both axes are standard, so you have a fully loaded telescope right from the start. This mount is the most rigid and stable in its price range. It features precision worm gears for extremely smooth motion. Simple schematic of how the telescope works. Observe hundreds of galaxies, nebulae, and star clusters of all types your very first night out, and hundreds more the next night out, Simply by observing through your new telescope. Watch as the telescope moves effortlessly and smoothly from major planet to asteroid to galaxy to nebula with the flexible slow moving controls on each axis, placing every object in the center of the telescopic field. Study fine fault lines on the Moon, structural detail in Jupiter s cloud belts and Red Spot, the Cassini division in Saturn s rings, and much more. This is a discontinued model a major US known manufacturer. The factory is in China. We purchased the rest of the pulls from them.. They will come in a Generic box, Warranty is through us. Our agreement to them was not to disclose the Manufacturer name, this is why we were very specific with the specifications in the ad. Every thing you need, this is a complete kit, great for beginners and provides plenty of room for growth. S&H IS $10.50 Features
|
 |
Carson Red Planet Series Newtonian Reflector Telescope - 35 - 87.5 X 76mm - RP-100RP-100
Sale Price: $89.00 |
DescriptionCarson Red Planet Series Newtonian Reflector Telescope - 35 - 87.5 X 76mm |
 |
CARSON RP-300 REDPLANET 45-100 X 114MM NEWTONIAN REFLECTOR TELESCOPE
Sale Price: $243.89 |
DescriptionCARSON RP-300 REDPLANETAPERTURE 114MM (4.5") 45X - 100X MAGNIFICATION; FOCAL LENGTH 900MM (35.4"); 6 X 30MM FINDER SCOPE; K20MM & K9MM EYEPIECES; EQUATORIAL MOUNT WITH STURDY ALUMINUM TRIPOD |
 |
Celestron 21024 FirstScope Telescope
List Price: |
DescriptionIn 1609, world-renowned Italian scientist, Galileo Galilei, introduced an elementary telescope to the growing astronomy community, which sparked interest into the mysterious night sky for centuries to come. Four centuries later, in celebration of the International Year of Astronomy 2009, Celestron offers the portable FirstScope Telescope. The FirstScope pays tribute to Galileo Galilei and many of history's most notable astronomers and scientists by displaying their names around the optical tube. Honoring the contributions of these men and women, who brought us one step closer to understanding the universe around us. The FirstScope is a wonderful keepsake for anyone interested in astronomy. This quality Dobsonian style telescope features a 76mm aperture reflector optical tube. FirstScope is an ideal entry-level astronomical telescope. It is very easy to observe with; you simply navigate the night sky by moving the tube in the direction of the desired object, making the viewing experience a snap! The compact design makes it easy enough to take with you on your next outdoor adventure. FirstScope is also stylish enough to be a decorative fixture on your bookshelf or desk. Features
|
 |
Celestron 93625 Universal 1.25-inch Camera T-Adapter
List Price: |
DescriptionFits (drop in style) any type of telescope that uses a 1.25" focuser or visual back. Allows you to attach your 35mm SLR camera to the prime focus of your telescope or spotting scope. Both a T-Adapter and T-Ring are required to mount a 35mm SLR camera to your instrument. Features
|
 |
Celestron 127EQ PowerSeeker Telescope
List Price: |
DescriptionCES1071 Features: -Telescope. -PowerSeeker collection. -Color: Black. -Material: Aluminum. -127 mm (5'') Newtonian reflector. -3x Barlow lens triples the magnifying power of each eyepiece. -Quick and easy no-tool setup. -Slow motion controls for smooth tracking. -Erect image optics - ideal for terrestrial and astronomical use. -Fully coated glass optical components with high transmission coatings. -Enhanced image brightness and clarity. -Accessory tray for convenient storage of accessories. -''The Sky'' level 1 planetarium software with 10,000 object database. -Dimensions: 11'' H x 17'' W x 33'' D. Features
|
 |
Orion SpaceProbe 3 Altazimuth Reflector Telescope
Sale Price: $99.99 |
DescriptionOrion's surprising little Spaceprobe 3 has been picked by independent reviewers as one of the best telescopes in its price class. Unlike similar telescopes seen in discount stores, Orion has refined the Spaceprobe 3 by paying attention to the little details, and that make this telescope a great value. The Spaceprobe 3 comes with an unusually complete set of accessories. The package includes two very good Explorer II eyepieces (25mm and 10mm), an adjustable altazimuth tripod, a good red-dot finder, a student edition of "The Sky" planetarium program, and a well written manual. The package even includes the tools you'll need to assemble the telescope and align the optics. The Spaceprobe 3 is a Newtonian reflector. That means it uses mirrors instead of lenses. Newtonians are primarily used for astronomy because the images are upside-down. Orion includes a collimation tool and good directions for aligning the mirrors. The reward for aligning the mirrors is seen in images that snap into sharp focus. My Spaceprobe 3 arrived properly aligned right out of the box. With its Explorer II eyepieces, this telescope consistently delivers fine views. Using the 25mm eyepiece (28x magnification) the Pleiades cluster is simply wonderful, showing dozens of stars. From a rural location with a dark sky, the Orion Nebula is a big ghostly glow, and when I zoom in with the 10mm eyepiece, the Trapezium resolves into four tiny pinpoints. The double star Gamma Andromeda becomes two beads of light, one gold, the other one pale blue. Moon and planet images are crisp, with none of the false color I see in low cost refractors. When I look at the Moon I see mountains and terraced walls inside the larger craters. With the 10mm eyepiece (about 70x), Saturn's rings are sharply separated from the planet, and I can even pick out the planet's shadow on the rings. The Altazimuth mount included with this telescope is light and easy to use; it may be the best choice for a young astronomer. If you want motorized tracking of the stars and planets, Orion's Spaceprobe 3 EQ is available with an equatorial mount, and Celestron sells essentially the same optical system with the computerized NexStar 76GT. -Jeff Phillips Pros: Best in class optical performance Two good Explorer II eyepieces Complete accessory package Cons: Small 76mm aperture Upside-down terrestrial images If you're looking for an affordable entry-level telescope for that beginning astronomy enthusiast, our SpaceProbe 3 Altaz is the perfect choice. Great for all-around stargazing, this highly portable, uncomplicated scope is just the right size and weight for the entire family, and just the right price for parents. This is a quality telescope, with a 3" (76mm) glass primary mirror mounted in a sturdy Neptune Blue Metallic aluminum tube. The rack-and-pinion focuser accepts standard 1.25" eyepieces. Two Explorer II eyepieces, a low-power 25mm (28x) and a high-power 10mm (70x), are included. An EZ Finder II finder scope mounted on the tube helps zero-in on the sky target. The altazimuth mount is lightweight and easy to use. To aim it, simply move it up or down or left or right. An adjustable, aluminum tripod with accessory tray is also included. One-year limited warranty. Features
|
 |
Orion StarBlast 4.5 Astro Telescope
Sale Price: $199.99 |
DescriptionOrion StarBlast 4.5 Astro Reflector TelescopeLaunch a lifetime of stargazing with this compact, ready-to-use telescopeTop-notch optics show you the moon, the planets, the stars and moreScope comes fully assembled so you can go from box to backyard in minutesHigh-quality optics, point-and-view ease of use, remarkable portability, all for less than $200Your ticket to space-tourism without the zero-G nauseaMaybe it's because many of us started out with those frustrating little department store refractors, but at Orion we strive to offer quality telescopes for beginners that are easy to use and will inspire their natural inclination to explore.The Orion StarBlast is one such telescope. Pint-sized in stature, it's a real reflecting telescope that's super-simple to use and yet manufactured with the kind of quality you'd expect in more expensive models.The Orion StarBlast is a point-and-view telescope that swivels smoothly on its sturdy, low-profile base. No complicated setup is required. In fact, it comes pre-assembled and ready for action right out of the box! Just carry it outdoors by its built-in handle, place it on the ground or on a picnic bench, and let the fun begin!Inside the StarBlast's 18"-long steel tube are real, quality telescope optics, including a 114mm (4.5") parabolic mirror. With the two Explorer II telescope eyepieces, upcoming skywatchers will see spectacular views of the Moon's craters, the planets, star clusters, and lots of other exotic space stuff. Aiming the Orion StarBlast is easy with the EZ Finder II "red dot" finder scope. The package also includes an eyepiece rack and a snap-on dust cap.The Orion StarBlast will not only give beginners hour after hour of fun, but will also nurture their interest in the night sky. One-year limited warranty. This item cannot be shipped internationally due to its size and weight. Features
|
 |
Orion SpaceProbe 130 EQ Reflector
List Price: |
DescriptionShips to the U.S. including Alaska, Hawaii, and Puerto Rico. Orion SpaceProbe 130 EQ Reflector Telescope An affordable but very capable telescope130mm aperture and 900mm focal length for great all-around viewing performanceIncludes sturdy tripod and equatorial mount for hands-free celestial trackingIncludes two eyepieces, finder scope, focuser, collimation cap, and FREE Starry Night astronomy softOne-year limited warranty A lot of folks shopping for their first telescope tell us that they have always had a fascination with the stars. They've been wanting to get a telescope for a long time, they say. We understand very well the lure of the night sky. It has intrigued mankind for millennia with its beauty and mysteriousness. And still does. So it's only natural to want to know more about it, to get a closer look. If you share this fascination, and are ready finally to spring for that telescope, then consider the affordable but very capable Orion SpaceProbe 130mm EQ Reflector Telescope. Sporting the classic long-tube Newtonian design, the Orion SpaceProbe 130mm provides great all-around viewing performance. One minute you can be studying lunar crater formations at high power; the next, the ethereal glow of a nebular star factory. A few minutes later, the ringed visage of Saturn. All served in crisp detail by way of the SpaceProbe's light-gathering 130mm (5.1") primary mirror of 900mm focal length (f/6.9). The mirror lies at the base of the rolled-steel optical tube, which is outfitted with a smooth rack-and-pinion focuser. It accepts 1.25" telescope eyepieces, including the two fully coated Explorer II telescope eyepieces that come standard with the Orion SpaceProbe 130mm: a 25mm for low-power viewing at 36x and a 10mm for higher-power looks at 90x. Also standard is a 6x30 achromatic finder scope to help home in on celestial targets. The mount is our sturdy EQ-2 equatorial model, with adjustable aluminum legs and accessory tray. Slow-motion controls allow fine The Orion SpaceProbe 130 EQ Reflector is a Newtonian reflector telescope packaged with a sturdy equatorial mount, two Explorer II eyepieces, a 6x30 finder scope, and Orionâs Starry Night Special Edition software. Invented by Sir Isaac Newton, reflector telescopes provide more light gathering power per dollar than any other telescope design. With 130mm (5.1 inches) of aperture, the SpaceProbe 130 produces images that are twice as bright as 90mm telescopes and more than four times brighter than 60mm beginner scopes. The Orion SpaceProbe 130 EQ Reflector with its Explorer II eyepieces serves up bright, clear images of the Moon, the planets, and even deep space objects like star clusters and galaxies. The 25mm eyepiece magnifies the image by 36 times; when I look at the Pleiades or Seven Sisters cluster at 36X the SpaceProbe 130 shows me a bright open cluster with dozens of point-like stars filling the field of view. When I use the 10mm eyepiece (90X magnification) the lunar disk fills the field of view and the rings of Saturn are plainly resolved. And when I use an optional Ultima 2X Barlow with the 10mm eyepiece for 180X magnification I can see the cloud bands of Jupiter and pick out individual stars in bright globular clusters like M13. The EQ2 equatorial mount included with the Orion SpaceProbe 130 EQ Reflector comes partially assembled, but it shouldn’t take long to set up. The trick to using an equatorial mount is to point the polar axis at Polaris, the North Star. Once the mount is aligned and balanced, the telescope tracks stars and planets at high power with just a turn of one slow motion knob. You can even add an optional motor drive for hands free tracking. The Orion SpaceProbe 130 EQ Newtonian Reflector Telescope is a simply a great value. The Explorer II eyepieces deliver bright sharp images of the Moon, the planets and the stars, and the EQ2 mount can be motorized for hands free tracking. --Jeff Phillips Pros: More than 4 times brighter than 60mm scopes Includes two eyepieces and a 6x30 finder Solid equatorial mount and aluminum tripod Starry Night software and SkyTheatre DVD included Features
|
 |
How to Make a Telescope ( Second English Edition)
Sale Price: $24.95 |
DescriptionThe first edition of this book was universally acclaimed as the best book ever written for making a Newtonian telescope. This 2nd Edition is almost three times larger and adds to the original text new chapters on making a Cassegrainian telescope, optical windows, and equatorial mounts. Chapters on eyepieces and astronomical seeing have been expanded. Computer programs written in generic BASIC for reduction of Foucault test data. Included are indexes for the three principle magazines that carry telescope making information: Sky and Telescope's "Gleanings for ATM's" from November 1941 through June 1998, Scientific American magazine from 1925 through 1959 and the complete run of Telescope Making magazine. This book is the most complete single work available on making reflecting telescopes. |