Thursday, June 30, 2011

Vixen SX Polar Axis scope with Illuminator 2573

Vixen SX Polar Axis scope with Illuminator 2573 Reviews


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Vixen SX Polar Axis scope AM-PS-2573 is used for pointing the equatorial mount at the celestial pole precisely - this process is called "Polar alignment". When taking long exposure astrophotography of nebulae or star clusters you will have to set the telescope's axis of rotation parallel with the Earth's axis of rotation exactly. Specifications for Vixen SX Polar Axis scope AM-PS2573:Magnification:  6Objective lens size:  20mmPackage AMPS2573 Contents:Vixen SX Polar Axis scope


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Jul 01, 2011 00:25:04

Wednesday, June 29, 2011

Kendrick 2" to 1.25" Adapter, fits 1.25" Collimator to 2" Focusers

Kendrick 2" to 1.25" Adapter, fits 1.25" Collimator to 2" Focusers Reviews


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Allows you to use the 1.25" Laser Collimator on a 2" Focuser.


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Jun 29, 2011 11:38:04

Tuesday, June 28, 2011

Cstar "T-SERIES" 525 x 60mm Refractor Telescope

Cstar "T-SERIES" 525 x 60mm Refractor Telescope Reviews


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Cstar "T-SERIES" 525 x 60mm Refractor Telescope Feature

  • Telescope tube is made of 100% Aluminum Alloy.
  • Multi-Coated Optical Glass Lenses for increased light transmission and low color aberration.
  • Aluminum Alloy Yoke Mount adds stability to the telescope to reduce vibrations during viewing.
  • Accessory Tray for spare accessories when using the telescope.
This Cstar 60mm Glass Lens Full-Size Refractor telescope is perfect for the beginning and novice astronomer to view the night sky or check out nature during the day. Key Specifications: Objective/Aperture Size: 60mm, Focal Length: 700mm, Magnification: (H-12.5 = 56x (with 3x Barlow = 168x), SR-4 = 175x (with 3x Barlow = 525x), Mount: The Aluminum Alloy Yoke Mount adds stability to the telescope to reduce vibrations during viewing. The T-6525 features High Optical Quality Glass Lenses with a durable 100% Aluminum Alloy tube. Accessories include: 2 Tier Full Size Adjustable aluminum Tripod (adjusts from 24 inches to 48 inches in height) , 2 Eye-Pieces (H-12.5, SR-4), 1.5x Erecting Image Lens (Magnifies the image by 1.5 times and corrects the normally upside down and reversed telescope image into a right side up and correct from left to right image just a high powered spotting scope for land viewing), Dual size .95"-1.25 Diagnol Mirror (Corrects the normally upside down telescope image to be right side up for comfortable night sky viewing.), Accessory Tray: (To store your accessories while viewing), and a 5 power Optical Finder-scope for low power scanning.


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Jun 28, 2011 12:46:05

Sunday, June 26, 2011

Orion 10 f/8 Ritchey-Chretien Astrograph Telescope

Orion 10 f/8 Ritchey-Chretien Astrograph Telescope Reviews


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Orion 10 f/8 Ritchey-Chretien Astrograph Telescope Feature

  • 10" aperture astrograph detects delicate details of deep-sky denizens for awe inspiring astrophotos
  • Ritchey-Chretien optical design produces wonderfully flat, virtually coma-free images superior to those achievable with conventional reflector or Schmidt-Cassegrain telescope designs
  • Ideal for use with both medium and large-format astrophotography CCD cameras and DSLRs; provides a wide, fully illuminated filed and pinpoint star clarity out to the edge of the sensor
  • Features a 3" rotatable, machined, dual-speed (10:1) linear-bearing Crayford focuser that provides fine focus adjustment without slippage or felxure with heavy accessories attached
  • Designed with collimation in-mind, features a precisely center-marked secondary mirror and includes a Cheshire-style collimating tool, making it one of the most convenient RC's to collimate available
Go after even the most elusive and faint deep-sky targets with the Orion 10" f/8.0 Ritchey-Chretien Astrograph. Featuring virtually coma-free optics for superb imaging performance, the Orion 10" f/8.0 Ritchey-Chretien Astrograph boasts a plethora of deluxe features. Its precision hyperbolic primary and secondary mirrors are made of highest quality quartz optical glass with enhanced reflectivity (94-96%) aluminum coatings. The machined aluminum, dual-speed (10:1) 3" modified Crayford focuser with linear track bearing provides rigid, backlash-free support for hefty imaging accessories. Nine knife-edge computer-positioned internal light baffles in the optical tube, primary mirror tube baffles, and a baffled secondary mirror shield ensure maximum image contrast and brightness. Three 1.5" DC cooling fans built into the rear cell help to reduce cooldown time for the telescope to reach thermal equilibrium. Two wide "Losmandy-style" dovetail mounting plates are attached to both the top and bottom of the tube for easy mount attachment and use of optional guide scope for guided CCD imaging pursuits.


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Jun 27, 2011 09:54:06

Saturday, June 25, 2011

Jims Mobile (JMI) MOTOFOCUS for Celestron Refractors for Telescopes - MFCREF

Jims Mobile (JMI) MOTOFOCUS for Celestron Refractors for Telescopes - MFCREF Reviews


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Shop for Celestron from Telescopes.com! Celestron MOTOFOCUS for Celestron RefractorsC4-RC6-NC6-RC8-NC10-NC60C70C100C102CR-150Firstscope 80NexStar 80/102


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Jun 25, 2011 22:16:06

Friday, June 24, 2011

The Imaging Source 640 x 480 FireWire Color Telescope Camera

The Imaging Source 640 x 480 FireWire Color Telescope Camera Reviews


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The Imaging Source 640 x 480 FireWire Color Telescope Camera Feature

  • Camera Features:
  • Color FireWire camera with IR cut filter
  • 1/4" CCD, progressive scan
  • Resolution 640 x 480
  • Up to 60 color frame per second
With up to 60 fps, this astro CCD camera is ideally suited to color astrophotography, in which very fast sequences of images are captured. Using the shipped software - IC Capture.AS - you can capture lossless and uncompressed images sequences as AVI files. The telescope camera DFK 21AF04.AS generates a fast stream of uncompressed color images. In order to transfer these to the host PC, a very fast bus is required. Hence, the camera is fitted with a FireWire connector. IC Capture.AS performs color interpolation on the raw color data (RAW format) from the CCD chip. This reduces the load on the camera processor. Should, on the other hand, the camera be installed on a host PC in which the CPU is not particularly fast, color interpolation can be performed by the camera itself. In this case, the maximum refresh rate is 30 fps. Alternatively, should color interpolation not be desirable at all, AVI files can be written in RAW format. The telescope camera DFK 21AF04.AS uses a modern color CCD chip (ICX098BQ, progressive scan, manufactured by Sony). It outputs a resolution of 640 x 480 pixel at a 1/4" format. Even at long exposure times, its noise is minimal. The high quality of the CCD chip also permits its deployment in scientific image processing applications. The CCD camera DFK 21AF04.AS is equipped with an IR cut filter that blocks wavelengths above 700nm. Thus, its properties are similar to those of the human eye.


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Jun 24, 2011 23:12:04

Thursday, June 23, 2011

Celestron CGEM 925 Schmidt-Cassegrain Telescope - CELE415-1

Celestron CGEM 925 Schmidt-Cassegrain Telescope - CELE415-1 Reviews


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Celestron's CGEM-925 features our high-end 9.25" Schmidt Cassegrian OTA with XLT coatings mounted on our brand new CGEM mount.The Celestron CGEM mount has a fresh attractive bold appearance and is capable of carrying Celestron s higher-end SCT optical tubes (up to 11") securely and vibration free which is ideal for both imaging and visual observing. Ergonomic Design - CGEM was designed to be ergonomically friendly with large Altitude and Azimuth adjustment knobs for quick and easy polar alignment adjustment. The internal RA and DEC motor wiring provides a clean look and an easy and trouble free set up.Innovation - The CGEM series has a new innovative Polar alignment procedure called All-Star (patent pending). All-Star allows users to choose any bright star while the software calculates and assists with polar alignment. Another great feature of the CGEM sure to please astroimagers is the Permanent Periodic Error Correction (PEC) which will allow users to train out the worm gears periodic errors while the mount retains the PEC recordings. Performance - For objects near the Meridian (imaginary line passing from North to South) the CGEM will track well past the Meridian for uninterrupted imaging through the most ideal part of the sky. The CGEM mount has a robust database with over 40 000 objects 400 user defined programmable objects and enhanced information on over 200 objects.Celestron's CGEM mount is the perfect fit between the Advanced Series and CGE Series. Offering the portability of the Advanced Series and the precision of the CGE.High-Performance FeaturesCGEM Computerized Equatorial Mount Ultra sturdy 2" steel tripod with Accessory Tray 6x30 Finderscope for easy centering of objects40 000 object database with 400 user-definable objects and expanded information on over 200 objects Proven NexStar computer control technology Flash upgradeable hand control software and motor control units for downloading product updates over the Internet New "All-star" Polar


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Jun 24, 2011 03:10:03

Wednesday, June 22, 2011

Meade ETX70AT Telescope w/882 Tripod and Software

Meade ETX70AT Telescope w/882 Tripod and Software Reviews


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Meade ETX70AT Telescope w/882 Tripod and Software Feature

  • Exclusive multicoated, air-spaced achromatic objective lenses
  • Razor-sharp images of both astronomical and terrestrial subjects
  • Extremely portable at only 6.8 pounds
  • Telescope can be used on any flat surface
  • Meade 882 tripod included
The ETX70AT is my favorite of all the low-cost computerized telescopes, because of its compact body and also because it is so easy to use. The ETX70AT package includes everything a beginner needs to get started (except batteries). So what can you see, exactly, with this little telescope? It will show you craters on the Moon, the rings of Saturn and the moons of Jupiter. Take it with you to dark country skies and the little ETX70AT will even show you galaxies and reveal the Milky Way as a brilliant river of stars.

I found the low power views with the included MA25mm eyepiece, about 14X magnification, to be sharper from edge to edge than my 15X70 binoculars. Wide-field, low-power views allow you to take in the full picture of bright star clusters like the Pleiades. The Pleiades are known as the Seven Sisters because sharp eyed people can often see seven or eight stars with the naked eye, and though I've only ever been able to make out six, with the ETX70 on a good clear night, I counted 77 stars! The low power view of a rising moon, one day past full, was simply beautiful--the lunar rays splashed out of the major impact crater Tycho sharply etched against the Maria (the lunar seas).

Higher magnification with the MA9mm eyepiece did begin to reveal the optical defects that short focus achromatic refractors always show. The moon was rimmed by a bright green glow, and the craters were no longer quite as sharp. When I turned my gaze to Saturn, I could plainly see the rings and Saturn's moon Titan, using either the MA9mm (39X) or my own SP6.4mm eyepiece (55X), but the image was not as sharp as it would have been in a classic style long focus refractor.

The Autostar controller makes it easy to find more than 1400 celestial objects.
The Autostar computer included with the ETX70AT is simply amazing. Plug in the Autostar and the batteries, point the tube North and level, and the Autostar's easy alignment routine will pick two alignment stars and help you find them. You will still need a guide book, like Nightwatch by Terrence Dickinson, to introduce you to the bright stars by name, but this is about the only detail Meade left out of the ETX70AT package. Take Autostar's guided tour of "tonight's best," and you'll soon be looking at galaxies and star clusters. Yes, you really can see galaxies with a little telescope like this. All you need are dark skies and knowing where to look. And Autostar takes care of the "knowing where to look" part. Once the telescope is aligned, bring up M31 on the menu and press "GO TO." You'll find yourself looking at the Andromeda Galaxy, two million light years away. Even from a dark location in the country you'll see why amateur astronomers refer to galaxies as "faint fuzzies." This view of faint and fuzzy galaxies is very much the way they looked to comet hunter Charles Messier who first discovered these so called "M" objects.

A surprising number of people with bigger telescopes also own one of these little ETX refractors. There's no doubt about it, a compact, computerized telescope that actually finds things for you is just plain cool. --Jeff Phillips

Pros:

  • It's easy to find objects with the Autostar computer
  • Wide field views

Cons:

  • Planet views could be better
2/8/200615-19-33...


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Jun 23, 2011 03:51:04

Tuesday, June 21, 2011

Vixen Weight Shaft Camera Bracket-3796

Vixen Weight Shaft Camera Bracket-3796 Reviews


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Weight-Shaft Camera Bracket: for mounting a camera on the weight shaft of a GP or GP-DX mount. This weight-shaft bracket allows cameras to track across the sky with the main telescope. Weight: 302 grams / 10.7 oz.


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Jun 22, 2011 02:05:04

Monday, June 20, 2011

Orion 1.25" Enhanced Mirror Star Telescope Diagonal

Orion 1.25" Enhanced Mirror Star Telescope Diagonal Reviews


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Orion 1.25" Enhanced Mirror Star Telescope Diagonal Feature

  • The precision flat mirror in this 90 degrees diagonal is meticulously polished to yield excellent performance
  • Anodized aluminum housings are internally blackened for high contrast views free of glare
  • Fits 1.25" telescope focusers, accepts 1.25" eyepieces
  • Enhanced Aluminum mirror coatings yield 97% reflectivity for bright clear views
  • Includes dustcaps for storage
Don't put a standard-issue diagonal into a high-quality refractor or Cassegrain telescope or you'll be losing 10% or more of the light collected by the scope's optics. Use an Orion Enhanced diagonal instead. Their lab-tested enhanced aluminum coatings reflect 97% of the inbound light to your eyepiece, for brighter images compared to standard diagonals. Beautifully machined and anodized aluminum housings feature machine-threaded baffles for high contrast and nonmarring compression ring collars for securing the eyepiece. Nosepiece barrels are threaded to accept filters. Endcaps included.


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Jun 21, 2011 05:29:07

Sunday, June 19, 2011

Orion Prime Focus Camera Adapter for 2" Crayford Focuser

Orion Prime Focus Camera Adapter for 2" Crayford Focuser Reviews


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Orion Prime Focus Camera Adapter for 2" Crayford Focuser Feature

  • Adapter provides a T-thread to allow a camera body to be coupled to a threaded Crayford-type telescope focuser for prime focus photography
  • Attaches to camera T-ring
  • Attaches T-ring equipped DSLR or SLR camera to a threaded Crayford-style telescope focuser
  • Useful for prime-focus astrophotography
  • Requires the appropriate T-ring for your type of camera (sold separately)
This adapter provides a T-thread to allow a camera body to be coupled to the Orion 2" Crayford focuser for Newtonian reflectors (#13039) for prime focus photography. You will also need the appropriate T-ring for your camera (sold separately).


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Jun 19, 2011 20:53:03

Friday, June 17, 2011

Celestron 70LCM 70mm Computerized Refractor Telescope 22052

Celestron 70LCM 70mm Computerized Refractor Telescope 22052 Reviews


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Celestron 70LCM Computerized Telescope Refractor 22052 is a lightweight, complete package for exploring the night sky. The 70LCM Computer Telescope from Celestron sacrifices nothing in terms of optics and functionality, yet proves to be an easy to use, highly accurate telescope. Built with NexStar computer telescope technology, the Celestron 70LCM Telescope is a 70mm refractor that delivers premium image quality for viewing the cosmos or far away land objects. With a database of over 4,000 celestial objects, this Celestron telescope, gives you hours of observing opportunity. The 70LCM Computerized Telescope is a useful way to learn and have fun at the same time. The full featured refractor telescope package gives you all the tools to make space observation a breeze.Specifications for Celestron Computerized 70 LCM Telescope 22052:Optical Design:RefractorAperture:70 mm (2.76 in)Focal Length:900 mm (35.43 in)Focal Ratio:12.86Finderscope:Built-on StarPointerMount:Motorized AltazimuthEyepiece 1:25 mm (0.98 in)Magnification 1:36 xEyepiece 2:9 mm (0.35 in)Magnification 2:100 xStar Diagonal:1.25 Erect ImageAccessory Tray:No Tool, Quick releaseTripod:AluminumCD ROM:The SkyX First Light EditionHighest Useful Magnification:165 xLimiting Stellar Magnitude:11.7Resolution (Rayleigh):1.99 arcsecResolution (Dawes):1.66 arcsecLight Gathering Power:100 xAngular Field of View:1.2 °Linear Field of View (@1000 yds):61 ft (18.59 m)Optical Coatings:Fully-CoatedComputer Hand Control:Fully Computerized / Flash UpgradeableSlew Speeds:Nine slew speedsTracking Rates:Sidereal, Solar and LunarTracking Modes:Alt-Az, EQ North and EQ SouthAlignment Procedures:SkyAlign, Auto 2-Star Align, 1-Star Align, 2-Star Align, Solar System AlignDatabase:4,000 Object DatabaseWeight:12 lbs (5.44 kg)Features of Celestron 70mm LCM Computer Telescope 22 052:Good for terrestrial and celestial observing Built-on StarPointer finderscope to help with alignment and accurately locating objects Quick-release


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Jun 18, 2011 02:52:03

Thursday, June 16, 2011

Opteka 500mm f/8 High Definition Preset Telephoto Lens + Lens Converter To Telescope + 2X Teleconverter Kit + Opteka 70" Professional Tripod

Opteka 500mm f/8 High Definition Preset Telephoto Lens + Lens Converter To Telescope + 2X Teleconverter Kit + Opteka 70" Professional Tripod Reviews


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Opteka 500mm f/8 High Definition Preset Telephoto Lens + Lens Converter To Telescope + 2X Teleconverter Kit + Opteka 70" Professional Tripod Feature

  • Angle of View: 5°
  • Minimum Focus Distance: 33 ft.
  • Focus Modes: Manual focus
  • Aperture: f/8.0 - f/32.0
  • Filter Size: 67mm
An Opteka High Definition 500mm preset telephoto lens is fully automatic and incorporates not only computer optical design, but also the latest optical multi-coating techniques. The process of multi-coating assures virtually flare free photographs even under adverse lighting conditions resulting in crisp, high contrast pictures.

Preset Lenses are designed to retain a full range of exposure, automation and metering capabilities of the cameras on which they are mounted. This lens is great for nature and sports photography. The amazing power of this lens gives you the equivalent of looking through a pair of 10x power binoculars. It has a manual preset diaphragm, a rotating tripod mounting collar and a soft lens pouch.

Advances in high-index / low-dispersion optical glasses, new barrel materials, and exotic anti-reflection coatings, along with the latest in computer-aided-design / computer-aided-manufacturing, are combined to produce lenses of unprecedented quality. Diamond-cut from crystal-clear, water-white optical glass, Opteka lenses are ground and polished to a precise precision.

Opteka lenses put more creative control where it belongs - in your hands.

The Opteka 2x High Definition Tele-Converter is for use with T-Mount manual focus lenses. It will multiply the focal length of your existing lens by 2x, and will cut back the amount of light by two f/stops.

For example, using a 2x tele-converter with a 500mm lens will effectively increase the focal length to 1000mm. A lens set to f/2.8 will now be f/5.6.

Convert Lens into a high powered Telescope
Fits T-Mount lenses
Will Magnify Your Lens 10X its Focal length

Opteka applied their legendary craftsmanship and state-of-the-art engineering to create a unique professional tripod made for today's photographer/videographer. Compatible with most digital, film or video cameras.


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Jun 16, 2011 14:08:05

Tuesday, June 14, 2011

iOptron SmartStar-E-R80 8502P Computerized Telescope (Pulsar Purple)

iOptron SmartStar-E-R80 8502P Computerized Telescope (Pulsar Purple) Reviews


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iOptron SmartStar-E-R80 8502P Computerized Telescope (Pulsar Purple) Feature

  • 80mm achromatic refractor telescope. 400mm focal length
  • 5x24 finderscope for locating objects
  • Computerized Alt-Azimuth Mount? The Cube- Hot Product 2008 by Sky and Telescope Magazine. 5-speed drive speed for precise tracking.
  • Includes GoToNova hand controller, the most intuitive controller on the market. 5,000 object database plus 256 user-defined objects.
  • K10 and K20 eye pieces
Introducing iOptron SmartStar-E-R80 Entry Level telescope. Designed with the latest technology the 80 mm lens is crafted with a fluorite based, low dispersion glass that is ground and polished to exact specifications. The precision design is excellent for viewing bright stars, planets and their moons, as well as for bird watching and other land objects. Two eye pieces come standard to allow for flexibility in viewing either a wider field or a single focused object. The SmartStar-E-R80 refractor telescope comes with our patented Alt-Azimuth Mount, a.k.a. The Cube, rated 4-star by Sky and Telescope Magazine. This compact mount design is probably the most functional and flexible unit on the market. Both axis motors are built into a small single unit which is universally compatible with all telescopes using a dove-tail connection. In addition, there are no “dead spots” – so you can point your telescope to ANYWHERE above the horizon, whereas, other mounts block the telescope tube at certain points of rotation. This mount also comes standard with AC connection. The GoToNova hand Controller on each SmartStar telescope is much easier to use than other similar products. The hand controller is more intuitive with menu categories better organized. It also has a larger LCD screen with more lines of content compared with the competition. Using the easy-to-use hand controller and its large LCD screen, you can easily set up your telescope and select where you want to go. The revolutionary GoToNova computerized control system is by far the most technologically advanced automated tracking system available on the market today. With a database of 5,000 celestial objects, including all of the most famous galaxies, nebulae, star clusters, not to mention the planets, you’ll be able to enjoy star gazing with the simple push of a few buttons.


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Jun 15, 2011 03:59:05

Monday, June 13, 2011

Orion SkyQuest XX12i Dobsonian Telescope, Shroud & Case Set

Orion SkyQuest XX12i Dobsonian Telescope, Shroud & Case Set Reviews


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Orion SkyQuest XX12i Dobsonian Telescope, Shroud & Case Set Feature

  • A complete portable big-aperture telescope set - includes our innovative XX12i Truss Tube Dobsonian, view optimizing Light Shroud, and custom Case Set to hold and transport the optical tube components safely
  • Traditional 8-truss reflector optical tube design offers superior optical tube rigidity compared to other designs in this category
  • IntelliScope computerized object locating technology pinpoints any of 14,000 objects in seconds
  • Included custom-designed light shroud for the SkyQuest XX12i telescope to block stray light to improve image contrast
  • Included three case set designed to protect the optical tube sections of the SkyQuest XX12i Truss Tube Dobsonian reflector during transport
If the idea of a big-aperture telescope appeals to you, but the portability issue has kept you on the fence, you can hop off it now. We've got the perfect solution - the SkyQuest XX12i IntelliScope Truss Tube Dob. It's a deep-sky observer's dream scope, offering jumbo 12" Pyrex optics (f/4.9); a stylish, reduced-weight base outfitted with IntelliScope object location technology; and a sturdy truss tube design that disassembles in about a minute into compact, easily portable components. Finally, a deluxe, large-aperture Dobsonian that fits comfortably in a compact car for transport to your favorite observing site! The eight trusses (four captive pairs) provide more-rigid support than other designs in this category. We've also outfitted the XX12i base with nothing but the best materials: EbonyStar laminate and Virgin Teflon azimuth bearing surfaces provide silky smooth azimuth motion. Equipped with dual-speed (11:1) 2" Crayford focuser, large 8" altitude bearings, full set of great accessories, a computerized database of 14,000 celestial objects -- and a price just north of a grand! -- the XX12i is one killer telescope deal. One-year limited warranty. Package includes a custom designed water-resistant shroud and three waterproof, double-stitched polyester/nylon cases especially designed for the SkyQuest XX12i.


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Jun 14, 2011 01:19:03

Sunday, June 12, 2011

Celestron CGEM Computerized Mount for Telescopes - CELE412

Celestron CGEM Computerized Mount for Telescopes - CELE412 Reviews


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Shop for Celestron from Telescopes.com! The Celestron CGEM mount has a fresh attractive bold appearance and is capable of carrying Celestron s higher-end SCT optical tubes (up to 11") securely and vibration free which is ideal for both imaging and visual observing. Ergonomic Design - CGEM was designed to be ergonomically friendly with large Altitude and Azimuth adjustment knobs for quick and easy polar alignment adjustment. The internal RA and DEC motor wiring provides a clean look and an easy and trouble free set up. Innovation - The CGEM series has a new innovative Polar alignment procedure called All-Star (patent pending). All-Star allows users to choose any bright star while the software calculates and assists with polar alignment. Another great feature of the CGEM sure to please astroimagers is the Permanent Periodic Error Correction (PEC) which will allow users to train out the worm gears periodic errors while the mount retains the PEC recordings. Performance - For objects near the Meridian (imaginary line passing from North to South) the CGEM will track well past the Meridian for uninterrupted imaging through the most ideal part of the sky. The CGEM mount has a robust database with over 40 000 objects 400 user defined programmable objects and enhanced information on over 200 objects. Celestron's CGEM mount is the perfect fit between the Advanced Series and CGE Series. Offering the portability of the Advanced Series and the precision of the CGE. Features: CGEM Computerized Equatorial Mount Ultra sturdy 2" steel tripod with Accessory Tray 40 000 object database with 400 user-definable objects and expanded information on over 200 objects Proven NexStar computer control technology Flash upgradeable hand control software and motor control units for downloading product updates over the Internet New "All-star" Polar alignment uses any bright star for a quick and accurate Polar alignment Software Features include: Mount Calibration Database Filter Limits Hibernate


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Jun 13, 2011 00:13:05

Saturday, June 11, 2011

Televue 5x Powermate 1.25 inch (1-1/4 in.)

Televue 5x Powermate 1.25 inch (1-1/4 in.) Reviews


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Televue 5x Powermate 1.25 inch (1-1/4 in.) Feature

  • Latest Version, Accepets the T-Ring Adapter
  • Vignetting, edge field aberrations and pupil movement - all introduced when using Barlows with long focal length eyepieces, are minimized.
  • Telecentric operation (field rays leave parallel to optical axis, unlike Barlow lenses which diverge rays). This is ideal for Hydrogen-alpha filter use such as with Daystar models.
  • High performance for image amplification, CCD or film (some of the finest Earth-based planetary imaging is being done with Powermates).
  • Flexible for visual and imaging with all types of telescopes and eyepieces. Essentially Parfocal, and with nearly constant magnification regardless of image distance behind top surface (except 5x model which increases 1x for every 35mm of image distance increase).
Tele Vue Barlows: "An Optically Perfect Window " Properly designed Barlows do wonderful things. First, they amplify power while retaining the eyepiece's eye-relief. Second, they slow the telescope's f/#, which improves eyepiece sharpness. Third, the designer can introduce compensations for eyepiece aberrations. The 2.5X Powermate Barlow is a 4-element parfocal, compact amplifying lens system. POWERMATE consists of a negative achromatic doublet plus a positive "pupil-correcting" doublet. While it looks and functions like a Barlow, your eyepiece will operate with pupil locations where the designer intended, avoiding mismatch problems. POEWRMATE optimally mates its power to your eyepieces. No additional "interface lens" is needed, since POWERMATES have it built-in. In addition to full multi-coating, POWERMATE includes other Tele Vue special touches such as a safety undercut on the chrome barrell, and captive lock screws that can't fall out. Tele Vue's 100% QC program at f/4 insures that POWERMATE will add dramatic power (and NOTHING ELSE) to your favorite eyepieces. If, for example, you own a 22mm Panoptic, you'll have the power of an 8.8mm focal length eyepiece with the 2.5x POWERMATE. The POWERMATES are constructed to be parfocal with Tele Vue's 1-1/4" 90 degree diagonal (often used in Ranger telescopes) adding convenience not previously available with any Barlow. The 2.5X POWERMATE has no filter threads Dobsonian/Ne


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Jun 12, 2011 02:19:06