Archive for the ‘Cassegrains’ Category
Last Updated on Tuesday, 13 July 2010 07:50 Written by Administrator Tuesday, 13 July 2010 07:50
Orion SkyView Pro ED100 GoTo Refractor Telescope Review
A review of Orion SkyView Pro ED100 GoTo Refractor Telescope.
Price: 1,449.95 USD
Manufacturer: Orion
Orion SkyView Pro ED100 GoTo Refractor Telescope – Product Warranty: One year
Product Type: Telescopes > Cassegrains
Our 150mm Mak opens up new vistas of the celestial landscape for your viewing pleasure. And now it’s available with full GoTo motorized computer control! The GoTo system automatically points the telescope to any of 42,900 objects in its database. The 150mm-diameter Maksutov-Cassegrain optics take in 40% more light than their 127mm counterpart, which means this big Mak will resolve finer detail in lunar and planetary subjects and permit exploration of a wider array of deep-sky objects. The long 1800mm focal length belies the scope’s compact size, yet provides serious magnifying power. The meniscus lens is fully multi-coated for maximum light transmission. Includes an 8×40 finder scope, 90-deg prism diagonal, and a 26mm (69x) Sirius Plossl eyepiece (1.25″).
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Last Updated on Tuesday, 13 July 2010 07:50 Written by Administrator Tuesday, 13 July 2010 07:50
Celestron EdgeHD 800 CGEM SCT Review
Review of Celestron EdgeHD 800 CGEM SCT.
Price: 2,399.00 USD
Manufacturer: Celestron
Celestron EdgeHD 800 CGEM SCT – Product Warranty: Two year
Type of Product: Telescopes > Cassegrains
Celestron’s innovative new EdgeHD telescopes are aplanatic Schmidt Cassegrain models designed to produce aberration-free images across a wide visual and photographic field of view. Celestron EdgeHD optics produce a focal plane more than three-times flatter than a standard Schmidt Cassegrain telescope. This guarantees you visibly sharp stars across some of the largest CCD chips available today. Superior edge performance not only creates rounder, more pleasing stars but actually improves the resolution and limiting magnitude when compared to telescopes of equal aperture. With Celestron’s High Definition optics you will be able to capture the faintest of galaxies all the way to the corner of your full frame camera chip. Coupled with Celestron’s XLT coating group on every surface, EdgeHD optics gives you maximum light throughput across the widest visual and photographic spectrum. The EdgeHD tube has been redesigned with top-notch features to make sure you get the most from your optics each and every night. Mirror locks hold the mirror in place and reduce image shift when rotating the tube around the mount. Flexible rods allow the mirror to be held in place without putting any force or pressure on the mirror, keeping the image centered in the eyepiece (or chip). Cooling tube vents located on the rear cell allow hot air to be released from behind the primary mirror. Each vent has an integrated 60 micron mesh filter guaranteed to let warm air out without letting dust in.
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Last Updated on Tuesday, 13 July 2010 07:50 Written by Administrator Tuesday, 13 July 2010 07:50
Orion 6 f/9 Ritchey-Chretien Astrograph Telescope Review
Review of Orion 6 f/9 Ritchey-Chretien Astrograph Telescope.
Price: 779.95 USD
Manufacturer: Orion
Orion 6 f/9 Ritchey-Chretien Astrograph Telescope – Product Warranty: One year
Product Type: Telescopes > Cassegrains
The Orion 6″ Ritchey-Chretien Astrograph’s outstanding optical design lets you capture spectacular, detailed images of deep-sky objects like never before. Unlike conventional Newtonian reflector and Schmidt-Cassegrain designs that are susceptible to coma away from the center of the field, the Ritchey-Chretien utilizes hyperbolic primary and secondary mirrors, made of BK-7 optical glass, to achieve wonderfully flat-field images that are virtually coma-free. Images are also free from chromatic aberration, since there are no lenses. The Orion 6” Ritchey-Chretien Astrograph is ideal for use with small-format CCD cameras like our StarShoot line, as well as DSLR cameras. The telescope’s wide, fully illuminated flat field produces pinpoint star clarity all the way to the edge of the camera’s sensor. The Orion 6” Ritchey-Chretien Astrograph features a machined, dual-speed (10:1) Crayford-style focuser with an engraved millimeter scale on the drawtube. The secondary mirror is precisely center-marked to facilitate collimation. The 19-inch enameled steel optical tube weighs only 12.3 lbs. and features a Vixen-style dovetail mounting bar underneath, for trouble-free setup on medium or large-sized equatorial mounts. The inside of the optical tube is fortified with eight computer-positioned light baffles, and the primary mirror baffle tube and secondary mirror light shield are also highly baffled to ensure maximum image contrast. One-year limited warranty.
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Last Updated on Tuesday, 13 July 2010 07:50 Written by Administrator Tuesday, 13 July 2010 07:50
Orion 8 f/8 Ritchey-Chretien Astrograph Telescope Review
A review of Orion 8 f/8 Ritchey-Chretien Astrograph Telescope.
Price: 1,195.95 USD
Manufacturer: Orion
Orion 8 f/8 Ritchey-Chretien Astrograph Telescope – Product Warranty: One year
Type of Product: Telescopes > Cassegrains
The Orion 8″ Ritchey-Chretien Astrograph’s outstanding optical design lets you capture spectacular, detailed images of deep-sky objects like never before. Unlike conventional Newtonian reflector and Schmidt-Cassegrain designs that are susceptible to coma away from the center of the field, the Ritchey-Chretien utilizes hyperbolic primary and secondary mirrors, made of BK-7 optical glass, to achieve wonderfully flat-field images that are virtually coma-free. Images are also free from chromatic aberration, since there are no lenses. The Orion 8” Ritchey-Chretien Astrograph is ideal for use with small CCD-chip cameras such as our StarShoot line, as well as medium-format CCD and DSLR cameras. The telescope’s wide, fully illuminated flat field produces pinpoint star clarity all the way to the edge of the camera’s sensor. The Orion 8” Ritchey-Chretien Astrograph features a machined, dual-speed (10:1) Crayford-style focuser with an engraved millimeter scale on the drawtube. The secondary mirror is precisely center-marked to facilitate collimation. The 21-inch enameled steel optical tube weighs only 15.8 lbs. and features a Vixen-style dovetail mounting bar underneath, for trouble-free setup on medium or large-sized equatorial mounts. The inside of the optical tube is fortified with eight computer-positioned light baffles, and the primary mirror baffle tube and secondary mirror light shield are also highly baffled to ensure maximum image contrast. One-year limited warranty.
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