telescope focuser
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HOTECH Advanced CT Laser Collimator - HOTE008-4
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DescriptionOptions Explained:There are two option menus you need to select when purchasing this product. First the Model Type asks with or without the adjustment stage. A Tripod is needed for using this set up. Some people have tripods with built in fine adjustment controls and some do not have this feature. The Fine Adjustment Controls are needed for acurate collimation - so a choice is given to buy it with or without this feature.You also have the choice of Model Size. Simply choose 1.25" or 2" focuser for your telescope. This reflector mirror goes into your telescopes focuser and is available in your choice of sizes. "This is a very clever device. By using three perfectly aligned laser beams it simulates the parallel rays coming from a distant star. The beams then pass through the telescope twice to amplify any error in the entire system making even small miscollimation errors readily seen and fixed. David's done his homework on this one coming up with a very ingenious answer to daytime collimation of an SCT." Craig Stark Ph. D. Associate Professor and Founder of Stark Labs & PHD Guiding"We have used the HOTECH Advanced CT Laser Collimator on our CDK Telescope to set the initial primary to secondary collimation with good result. HoTech's elegant design and high quality construction allows for ease of setup and makes this an invaluable tool for collimating a Cassegrain Telescope." Allan Keller PlaneWave Instruments Innovation brings Affortable and Portable Collimation into RealitySince the invention of the Cassegrain Telescope in 1672 by the French sculptor Sieur Guillaume Cassegrain the Cassegrain Telescope has evolved into various derivative designs such as the more popular Ritchey-Chr� tien Dall-Kirkham Schmidt-Cassegrain and Maksutov-Cassegrain. The designs have gained their popularity because of their compact and simple to produce design. With different designs star collimation is and has always been the only effective method to collimate for Cassegrain telescope |
What do I have?
I bought a reflecting telescope out of focus eBay.The if it is a focusing mechanism moves a slide not up down, but moves horizontal.The secondary mirror focuser it.Is this or is it just a change of focal length? And if there is a focusing mechanism can be mounted on the top of the slide? I have no eye for it, so can not drop a focus to see if ... any help will be .... big thanks no make or model anywhere
This sounds like a Newtonian Vixen, imported from Japan for about a decade ago Celestron. It focuses by sliding the eyepiece holder and even secondary and primary pipe. Despite the unusual focus mechanism, these telescopes were excellent, usually mounted on Vixen Polaris equatorial mount fine.
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HOTECH Advanced CT Laser Collimator - HOTE008-4
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DescriptionOptions Explained:There are two option menus you need to select when purchasing this product. First the Model Type asks with or without the adjustment stage. A Tripod is needed for using this set up. Some people have tripods with built in fine adjustment controls and some do not have this feature. The Fine Adjustment Controls are needed for acurate collimation - so a choice is given to buy it with or without this feature.You also have the choice of Model Size. Simply choose 1.25" or 2" focuser for your telescope. This reflector mirror goes into your telescopes focuser and is available in your choice of sizes. "This is a very clever device. By using three perfectly aligned laser beams it simulates the parallel rays coming from a distant star. The beams then pass through the telescope twice to amplify any error in the entire system making even small miscollimation errors readily seen and fixed. David's done his homework on this one coming up with a very ingenious answer to daytime collimation of an SCT." Craig Stark Ph. D. Associate Professor and Founder of Stark Labs & PHD Guiding"We have used the HOTECH Advanced CT Laser Collimator on our CDK Telescope to set the initial primary to secondary collimation with good result. HoTech's elegant design and high quality construction allows for ease of setup and makes this an invaluable tool for collimating a Cassegrain Telescope." Allan Keller PlaneWave Instruments Innovation brings Affortable and Portable Collimation into RealitySince the invention of the Cassegrain Telescope in 1672 by the French sculptor Sieur Guillaume Cassegrain the Cassegrain Telescope has evolved into various derivative designs such as the more popular Ritchey-Chr� tien Dall-Kirkham Schmidt-Cassegrain and Maksutov-Cassegrain. The designs have gained their popularity because of their compact and simple to produce design. With different designs star collimation is and has always been the only effective method to collimate for Cassegrain telescope |
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HOTECH Advanced CT Laser Collimator - HOTE008
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DescriptionOptions Explained:There are two option menus you need to select when purchasing this product. First the Model Type asks with or without the adjustment stage. A Tripod is needed for using this set up. Some people have tripods with built in fine adjustment controls and some do not have this feature. The Fine Adjustment Controls are needed for acurate collimation - so a choice is given to buy it with or without this feature.You also have the choice of Model Size. Simply choose 1.25" or 2" focuser for your telescope. This reflector mirror goes into your telescopes focuser and is available in your choice of sizes. "This is a very clever device. By using three perfectly aligned laser beams it simulates the parallel rays coming from a distant star. The beams then pass through the telescope twice to amplify any error in the entire system making even small miscollimation errors readily seen and fixed. David's done his homework on this one coming up with a very ingenious answer to daytime collimation of an SCT." Craig Stark Ph. D. Associate Professor and Founder of Stark Labs & PHD Guiding"We have used the HOTECH Advanced CT Laser Collimator on our CDK Telescope to set the initial primary to secondary collimation with good result. HoTech's elegant design and high quality construction allows for ease of setup and makes this an invaluable tool for collimating a Cassegrain Telescope." Allan Keller PlaneWave Instruments Innovation brings Affortable and Portable Collimation into RealitySince the invention of the Cassegrain Telescope in 1672 by the French sculptor Sieur Guillaume Cassegrain the Cassegrain Telescope has evolved into various derivative designs such as the more popular Ritchey-Chr� tien Dall-Kirkham Schmidt-Cassegrain and Maksutov-Cassegrain. The designs have gained their popularity because of their compact and simple to produce design. With different designs star collimation is and has always been the only effective method to collimate for Cassegrain telescope |
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HOTECH Advanced CT Laser Collimator - HOTE008-1
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DescriptionOptions Explained:There are two option menus you need to select when purchasing this product. First the Model Type asks with or without the adjustment stage. A Tripod is needed for using this set up. Some people have tripods with built in fine adjustment controls and some do not have this feature. The Fine Adjustment Controls are needed for acurate collimation - so a choice is given to buy it with or without this feature.You also have the choice of Model Size. Simply choose 1.25" or 2" focuser for your telescope. This reflector mirror goes into your telescopes focuser and is available in your choice of sizes. "This is a very clever device. By using three perfectly aligned laser beams it simulates the parallel rays coming from a distant star. The beams then pass through the telescope twice to amplify any error in the entire system making even small miscollimation errors readily seen and fixed. David's done his homework on this one coming up with a very ingenious answer to daytime collimation of an SCT." Craig Stark Ph. D. Associate Professor and Founder of Stark Labs & PHD Guiding"We have used the HOTECH Advanced CT Laser Collimator on our CDK Telescope to set the initial primary to secondary collimation with good result. HoTech's elegant design and high quality construction allows for ease of setup and makes this an invaluable tool for collimating a Cassegrain Telescope." Allan Keller PlaneWave Instruments Innovation brings Affortable and Portable Collimation into RealitySince the invention of the Cassegrain Telescope in 1672 by the French sculptor Sieur Guillaume Cassegrain the Cassegrain Telescope has evolved into various derivative designs such as the more popular Ritchey-Chr� tien Dall-Kirkham Schmidt-Cassegrain and Maksutov-Cassegrain. The designs have gained their popularity because of their compact and simple to produce design. With different designs star collimation is and has always been the only effective method to collimate for Cassegrain telescope |
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Orion SkyQuest XT10 Classic Dobsonian Telescope
Sale Price: $529.99 |
DescriptionOrion(r) SkyQuest(TM) XT Classic Dobsonians It's no wonder customers heap 5-star ratings on these gentle giants. For not only do their jumbo-sized optics and uncomplicated design bring a "new level of joy to simple observing," raved Astronomy magazine, but they're also the most affordable quality Dobs on the market. SkyQuest XT Classics aren't just good bang for the buck, they're a supernova of telescope value! XT Classics give you the deep-space thrills without the deep-pocket frills. We've kept them lean and mean to keep their prices low for tight budgets. But rest assured, they come fully equipped for adventure, whether you're a beginning stargazer or are graduating to a more capable instrument. All Classics feature an expertly figured parabolic mirror housed in an enameled steel optical tube. The tube rides on a stable Dobsonian base that allows easy point-and-view navigation and has a convenient carrying handle. A 2" Crayford focuser (XT6 has 1.25" rack and pinion focuser), EZ Finder II aiming device, 25mm Sirius Plossl eyepiece (1.25"), and quick-collimation cap are all standard equipment. Setup takes only a minute, leaving the rest of the evening to marvel at the planets, the Moon, and a myriad of deep-sky treasures. Enjoy the fantastic views â?" and savings! One-year limited warranty. Features
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Barska Anchormaster Telescope
List Price: |
DescriptionExpressing classic elegance and traditional sophistication, the Barska® Classic Connoisseur Collection is in a class by itself. These precision-made, high quality brass optics products make a stunning addition to any décor and are as functional to use as they are beautiful to look at. |
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Jims Mobile (JMI) MOTOFOCUS for Meade LightBridge 8/10/12 for Telescopes - MFGS02
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DescriptionShop for Optic Accessories from Telescopes.com! Jims Mobile (JMI) MOTOFOCUS for Meade Lightbridge 8/10/12 |
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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
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Celestron 21045 114mm Equatorial PowerSeeker Telescope
List Price: |
DescriptionCelestron PowerSeeker 114EQ 45 - 225X Reflector Telescope opens up the wonders of the universe to the aspiring astronomer. Amateur astronomy is a great hobby you can enjoy year-round, and Celestron's PowerSeeker Telescopes are the ideal choice for affordable stargazing enjoyment! PowerSeeker Scopes are quick and easy to set up, even for the novice... no tools required! Their sturdy Equatorial mounts are perfect for tracking objects across the night sky, meaning these Telescopes shine for moon- and planet-watching. All Celestron PowerSeekers include a tripod, full range of eyepieces, plus a 3X barlow lens. Specs: 114 mm aperture size; Includes 20 mm eyepiece for 45X magnification, 4 mm eyepiece for 225X, and a 3X barlow lens that triples the magnification power of each eyepiece; Newtonian reflector optical design; Fully-coated glass optics with high-transmission coatings for enhanced brightness and clarity; Sturdy German Equatorial mount, perfect for tracking objects across the night sky; Erect image diagonal, ideal for terrestrial and astronomical viewing; Comes with The Sky X Planetarium software; Focal length: 900 mm; Limiting stellar magnitude: 12.8; Resolution (Rayleigh): 1.22 arcsec; Resolution (Dawes): 1.02 arcsec; Light-gathering power: 265X; Angular F.O.V. is 0.9 degrees. Linear F.O.V. is 48' 5x24 mm finderscope; Includes aluminum tripod. Order yours today! Celestron PowerSeeker 114EQ 45X-225X Reflector Telescope I love bargains, so I was eager to try out Celestron's new Powerseeker 114 Newtonian reflector telescope. With its 4.5-inch mirror, Celestron's Powerseeker 114 gathers three times more starlight than popular 60mm refractors. The Powerseeker package includes two eyepieces (K20 and SR4), a plastic 3x barlow, and a lightweight equatorial mount. Optically, the Powerseeker 114 holds its own when compared with my Celestron Firstscope 114EQ. Using the K20 eyepiece included as standard equipment, about 45x magnification, it's easy to see the Andromeda Galaxy and its smaller satellite galaxy M32. When compared to 60mm refractors, the Powerseeker 114 brings out much more detail in the Orion Nebula, reveals many more stars in Perseus' Double Cluster and even brings out a few individual stars in globular clusters like M13. Saturn looks quite small at 45x with the K20 eyepiece, but using my own 7.5mm eyepiece (120x) I can easily detect the shadow cast by the planet on the rings, and even glimpse the ring's Cassini Division. When the mirrors are properly lined up or "collimated," the images are reasonably sharp up to magnifications of 225x. I find a collimation tool helps get this fine tuning just right. As good as the optics are, however, the effect of cost-cutting shows up in the mechanical components. The focuser is plastic, the finder scope is plastic, the rings that attach the telescope to the tripod are plastic. Even when the tripod legs are clamped at their shortest setting, the telescope wobbles when I try to focus at higher magnifications. Celestron's instruction manual correctly recommends that most viewing be done in the range of 40x to 130x. So what about that 675x magnification proclaimed on the box? I'd say it's not worth the trouble. Overall, the Celestron Powerseeker 114 is a budget priced telescope with good optical performance, especially when using the low power K20 eyepiece. If you're willing to spend a little more money, either Orion's SkyQuest XT4.5 or Celestron's Firstscope 114EQ will give you a sturdier mount, an improved finder scope, and better eyepieces. Also, for about the price of the Powerseeker 114, I like the dependable refractor design of Celestron's Firstscope 70EQ. --Jeff Phillips Pros: Low cost Good optics Serviceable K20 eyepiece Cons: Wobbly mount Difficult to collimate Plastic finder and focuser Features
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Orion SkyQuest XT8 Classic Dobsonian Telescope
Sale Price: $349.99 |
DescriptionA powerful and capable telescope, the Orion SkyQuest XT8 Classic Dobsonian is one of our most popular reflectors due to its elegant combination of precision optics, mechanical simplicity, and rock-solid stability. You and your whole family will appreciate the bright, clear views of the night sky provided by the XT8 Classic. The Moon and planets of our solar system like Jupiter, Saturn, and Mars shine brightly in the SkyQuest XT8 Classic, allowing you to inspect them in detail. The XT8's 8-inch aperture is also large enough to gather a significant amount of light from more distant celestial objects for great views of sparkling star clusters, cloudy nebulas, and faraway galaxies. The XT8 Classic Dob is a tremendous value considering the high quality views it provides on such a wide variety of celestial objects. The point-and-view simplicity of the Dobsonian design is not as complicated as an equatorial (EQ) mount and tripod, so with a little practice, your whole family can scan the heavens just like experienced hobbyists. For any astronomer seeking serious adventure, the XT8 Classic Dob has it all! Features
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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
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