Inch Diagonal Eyepiece
 |
Orion Apex 90mm Maksutov-Cassegrain Telescope
Sale Price: $229.99  |
DescriptionWith a tube length of 11 inches, a 90mm (3.5") precision-polished fully multi-coated meniscus front lens, and solid uncompromising construction. the Apex 90 Compact Mak is a paragon of portability, optical excellence, and durability. Better still, it's one of the most versatile scopes we offer. The Apex 90 delivers bright, high-contrast images, and with a focal length of 1250mm (f/13.9) you also get a generous image scale. It features a built-in 1/4"-20 adapter plate that makes it easy to mount onto a standard photo tripod for viewing grand daytime vistas. Attach a 35mm camera to the scope's visual back (with a T-ring adapter sold separately) and use the whole assembly as powerful telephoto lens for astrophotography and terrestrial shooting. What more could you want? Includes a 25mm Plossl eyepiece, 6x20 finder scope, 45-deg correct-image diagonal, and fully padded carrying case. One-year limited warranty. Features
|
Ocular and diagonally question?
Is there any advantage at all in using PE 1.25 inch with 2 "diagonal, or is the" neck bottle "1.25 barrel EP simply obstruct the full path of the light of the 'major' in diagonal? On the contrary, there are drawbacks to the use of only two diagonal. With any 1.25 "EP (including the fact that the additional mass of 2-inch diagonal)? Is easier to build a good quality 1.25 inches diagonal of a 2-incher?
It is entirely dependent on the precise geometry within its scope. You can solve this with a scale drawing of your telescope. Make drawing with optics "deployed", ie as if there's nowhere diagonal. First, note the target. Then, the lens focal point, draw a line whose length is the size of the focal plane image available to your eye (usually about an inch in the real telescope). Then draw "The rays of light" from each end of the image focal plane of the top and bottom of its target, four altothether lines. These show the size of cone of rays that can capture your eye. Then, figure out the diagonal is, however, many inches of the image focal plane and see how great ray cone is there. It is essential to capture all the rays, but you should get most of them.
US $4.95
 |
Meade 20218 NG-70SM 70mm Altazimuth Refractor Telescope
List Price: |
DescriptionMEADE 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. The complete package includes a sturdy metal tripod, a red dot viewfinder, two 1.25 inch eyepieces and a star diagonal, and a software DVD with instructional video. The NG-70SM Refractor Telescope comes disassembled in a compact box, but the instructional DVD video guides you through all the steps required for assembly. Go ahead and try it out in the daytime, that's the best time to align the red-dot finder scope while looking at a distant tree or telephone pole. The optics of Meade's NG-70SM produce an image that is right side up but the diagonal mirror reverses the image left-to-right. That's no problem most of the time, but an optional correct image diagonal is available. The low power 25mm eyepiece produces a magnification 28X which is just right for spotting the Moon or the planets, while the 9mm eyepiece (78X magnification) can be used to zoom in for more detail. The MH25 eyepiece at 28X shows a lovely view of the Lunar disk in a dark sky, while the MH9 eyepiece at 78X shows literally hundreds of craters on the Moon and begins to show the rings of Saturn and the cloud bands of Jupiter. For even better views it's easy to add better eyepieces. My best view of Saturn, for example, came with an optional 6.4mm Super Plossl eyepiece, about 110X magnification. The Altazimuth mount included with Meade's NG-70SM is lighter and easier to use than an Equatorial mount, yet the slow motion knobs make it easy to keep objects in view. The rotation of the Earth causes the Moon or planets to appear to drift out of the eyepiece, but the slow motion knobs make it easy to keep the telescope on target, even with a high power eyepiece. The telescope is sensitive to vibration, however, so a high power eyepiece can be difficult to focus. Meade's NG-70SM is a good entry level telescope at a very good price. The optics are good, the Altazimuth mount is easy to assemble and easy to use, the instructional DVD includes a nice Lunar Atlas as well as planetarium software, and it's easy to add better eyepieces to improve your view of the planets. –Jeff Phillips Pros: Light and easy to use Altazimuth mount includes slow motion knobs Easy to add better eyepieces Instructional DVD included; Cons: MH eyepieces have narrow field of view Vibrates while focusing at high power Features
|
 |
Celestron Collimation Eyepiece 1.25"
List Price: |
DescriptionThe Celestron Cheshire Collimation Eyepiece is ideal for precise collimation of Newtonians and helpful for aligning Schmidt-Cassegrains. This special eyepiece fits into 1¼" focusers or diagonals. Alignment is easy using the small opening on one end and thin cross hairs at the other end. The collimation eyepiece is more accurate than the simple Collimation Tool. Features
|
 |
Celestron 94305 Two-inch Eyepiece and Filter Kit
List Price: |
DescriptionCelestron 2in Eyepiece and Filter Kit 94305 If you've got a telescope or spotting scope equipped with a two-inch focuser, you will want to consider adding the Celestron 94305 Two-inch Eyepiece and Filter Kit. Featuring several of Celestron's high-quality accessories, this kit can be used with virtually any telescope or spotting scopes, regardless of the manufacturer, with a two-inch focuser. Included in the kit are: Three E-Lux two-inch eyepieces, featuring a three-element, fully multicoated optical design with a 56-degree apparent field of view (the 40mm has a 50-degree field of view), in 26mm, 32mm, and 40mm focal lengths. One two-inch Barlow 2x lens. This fully multicoated lens doubles the magnifying power of your eyepiece by doubling its effective focal length and gives you a total of six power combinations. Five colored eyepiece (lunar and planetary) filters, including one each of the following: Kodak Wratten numbers 12 (deep yellow), 21 (orange), 25 (red), 58 (green), and 80A (blue). These two-inch filters are designed to greatly enhance your enjoyment of the solar system. One two-inch, 90-degree, multicoated mirror diagonal that allows you to take advantage of the wider field of view provided by two-inch eyepieces. It fits all rear cells of Schmidt-Cassegrain telescopes and includes an adapter to use with refractor telescopes. The accessories are housed in a sturdy aluminum carrying case with a die-cut interior for convenient storage and protection. Each accessory is protected by Celestron's one-year limited warranty. What's in the Box Three E-Lux eyepieces, E-Lux Barlow lens, five lunar/planetary filters, 90-degree star diagonal, refractor adapter, and aluminum carrying case. Features
|
 |
BARSKA 40070 Starwatcher Compact Refractor Telescope with Table Top Tripod And Carrying Case
List Price: |
DescriptionAn ideal entry-level telescope for amateur astronomers, the Barska Starwatcher 300-power telescope brings you closer than ever to the stars and planets. The refractor telescope is equipped with such features as coated glass optics for enhanced image brightness, interchangeable eyepieces with 3x Barlow lenses for increased viewing power, and smooth-functioning mounts. For good measure, Barska added a beginner's version of the highly popular Deepsky Astronomy software, which is packed with a searchable database of more than 10,000 objects, including nebulae, star clusters, double stars, variable stars, and other types. Simply load it on your PC and begin your journey to the stars and planets. Bundled with a sturdy adjustable tripod and a soft carrying case, the telescope carries Barska's limited lifetime warranty. Specifications Max power: 300x Focal length: 400mm Finder scope: 5x24 Draw tube: 1.25 inches Eyepiece 1: SR4 Eyepiece 2: K20 Diagonal: 45 degrees Warranty: Limited lifetime About Barska Barska is a worldwide sport optics company with strong brand recognition within the optics industry, with corporate offices in La Verne, California, and warehouses and distribution centers in La Verne and Shanghai, China. Barska offers an extensive line of precision sport optics products, such as binoculars, riflescopes, spotting scopes, and telescopes. The product range has been designed and built with the latest optical technology, allowing users to enjoy all their favorite leisure time outdoor activities, including bird watching, outdoor observation, hunting, fishing, stargazing, concerts, and sporting events. The Barska 40070 Starwatcher Compact Refractor Telescope with Table Top Tripod and Carrying Case is an ideal telescope for the aspiring amateur astronomer. Ideal for students or those interested in learning more about the night sky, the 70mm objective lens can zoom up to 300x power. Use one of the interchangeable eyepieces with a 3x power Barlow lens for increased viewing capability. A pan-head mount and tripod is included with the telescope along with a handy carrying case. Take this portable telescope outdoors at night and the stars will open up before your eyes. There's an amazing show to be seen in the night sky and this Barska travel telescope is a great tool. You get a totally portable 300x telescope with a 70mm objective lens and a tabletop tripod. You also get a copy of the highly popular Deep Sky software, which includes a searchable database of over 10,000 celestial objects and a What's Up Wizard that delivers a list of what is visible at the observer's location. The telescope is a precision optical instrument that is perfect for the aspiring astronomer on the go. Includes the telescope, finder scope, eyepieces, software and a carry case. Features
|
|
Orion Apex 90mm Maksutov-Cassegrain Telescope
Sale Price: $229.99 |
DescriptionWith a tube length of 11 inches, a 90mm (3.5") precision-polished fully multi-coated meniscus front lens, and solid uncompromising construction. the Apex 90 Compact Mak is a paragon of portability, optical excellence, and durability. Better still, it's one of the most versatile scopes we offer. The Apex 90 delivers bright, high-contrast images, and with a focal length of 1250mm (f/13.9) you also get a generous image scale. It features a built-in 1/4"-20 adapter plate that makes it easy to mount onto a standard photo tripod for viewing grand daytime vistas. Attach a 35mm camera to the scope's visual back (with a T-ring adapter sold separately) and use the whole assembly as powerful telephoto lens for astrophotography and terrestrial shooting. What more could you want? Includes a 25mm Plossl eyepiece, 6x20 finder scope, 45-deg correct-image diagonal, and fully padded carrying case. One-year limited warranty. Features
|
 |
Barska Starwatcher Telescope
List Price: |
DescriptionThe Barska® Starwatcher telescope is an ideal entry-level telescope for the aspiring amateur astronomer. It is easy to set up and includes everything necessary to begin the adventure of a lifetime, including telescope, finderscope, eyepieces, mount and tripod. Each Starwatcher telescope also includes the Beginner's version of the popular Deepsky Astronomy Software, which includes a searchable database of over 10,000+ objects. |
 |
Orion Observer 70mm Altazimuth Refractor Telescope
List Price: |
DescriptionOur 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. And it's made of glass, not plastic, as you'd find in many department store models. The optical tube is supported on a sturdy aluminum tripod with accessory tray. This altazimuth model can also be used for terrestrial viewing. Standard accessories include a 10mm (70x) Explorer II eyepiece, a 25mm (28x) Explorer II eyepiece, 90-deg mirror star diagonal, and an EZ Finder II finder scope. One-year limited warranty. Features
|
 |
New 130mm Maksutov-Cassegrain Telescope
List Price: |
DescriptionWith tube length of 21 inches, a 130mm (5") precision-polished fully multi-coated meniscus front lens, and solid uncompromising construction. the 130mm Maksutov-Cassegrain is a paragon of portability, optical excellence, and durability. Better still, it's one of the most versatile scopes we offer. The model 2000x130 delivers bright, high-contrast images, and with a focal length of 2000mm (f/15.4) you also get a generous image scale. Using the flip knob can be turned to two positions. When it turned to up, intended for celestial observation. Turn it down for photography or terrestrial observation (with 45 Degree diagonal prism). The electrical Controlling system is designed for the operating convenience of the observer. The system is called track controlling system. It has the following 2 of functions: It can overcome the rotation of the earth from west to east, thus ensure the immobility of the image of the sky objects in the telescope. It can change the location of the sky objects image in the view field of the telescope, which makes that can objects more conveniently. What more could you want? This manufacturer has more than 15 years experience in the field of optical equipments Their OEM products such as telescope, microscope, riflescope, compass, etc., are all over the world. This telescope was manufactured in the very same factory that makes optical products for Bushnell, Tasco, Konus and many other name is an absolutely high quality product you can trust. Features
|
