Showing posts with label Telescope. Show all posts
Showing posts with label Telescope. Show all posts

Friday, January 13, 2012

Celestron CGEM 925 HD Telescope 11081

!9#: Celestron CGEM 925 HD Telescope 11081

Brand : Celestron | Rate : | Price : $3,499.00
Post Date : Jan 13, 2012 16:40:22 | Usually ships in 1-2 business days


Celestron CGEM 925 HD Telescope 11081

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Friday, January 6, 2012

Celestron EdgeHD 800 CGEM Schmidt-Cassegrain Telescope

!9#:Celestron EdgeHD 800 CGEM Schmidt-Cassegrain Telescope

Brand : Celestron
Rate :
Price : $2,399.00
Post Date : Jan 06, 2012 08:57:14
Usually ships in 1-2 business days



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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Tuesday, December 27, 2011

Celestron at NEAF 2009 - Sky & Telescope

S&T senior editor Dennis DiCicco talks to Celestron about its new products at the NorthEast Astronomy Forum 2009

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Tuesday, December 20, 2011

Celestron Edge HD 14" F/11 Aplanatic SCT OTA Telescope 91060-XLT

!9#: Celestron Edge HD 14" F/11 Aplanatic SCT OTA Telescope 91060-XLT


Rate : | Price : $4,999.99 | Post Date : Dec 20, 2011 17:50:05
Usually ships in 3-5 weeks

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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Tuesday, December 6, 2011

Celestron Edge HD 1400 On CGEM DX Mount 14" F/11 Aplantic SCT Telescope 11004

!9#: Celestron Edge HD 1400 On CGEM DX Mount 14" F/11 Aplantic SCT Telescope 11004

Brand : Celestron | Rate : | Price : $6,999.00
Post Date : Dec 06, 2011 18:24:54 | Usually ships in 3-5 weeks


Celestron Edge HD 1400 on CGEM DX Mount 11004

Celestron's CGEM DX 1400 features Celestron's high-end 14" Schmidt Cassegrian OTA with XLT coatings mounted on Celestron's brand new CGEM DX mount. The Celestron CGEM DX mount is the newest member of Celestron's fully computerized Equatorial mount series capable of carrying Celestron's high-end 11" and 14" optical tubes. The CGE PRO style, 2.75" leg tripod holds even the Celestron's 14" optics securely while dampening vibration, which is ideal for both imaging and visual observing. Capable of holding 50 lbs of payload and slewing at 5 degrees per second, you will be able to instantly point to any of the celestial objects in the database.

Ergonomic Design - The Celestron CGEM DX 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 Celestron CGEM DX series has a new innovative Polar alignment procedure called All-Star. All-Star allows users to choose any bright star, while the software calculates and assists with polar alignment. Another great feature of the CGEM DX 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 Celestron CGEM DX 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, 100 user defined programmable objects and enhanced information on over 200 objects.

Power Management - Redesigned electronics deliver constant regulated power to the motors making them capable of drivin

  • 14" Edge HD Optical System
  • Premimum Celestron Starbright XLT Coatings
  • 9x50 Finder Scope & Star Diagonal For Enhanced Viewing
  • Celestron CGEM DX Mount Holds a maximum instrument capacity of 50 lbs
  • CGEM DX Computerized Equatorial Mount

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Sunday, November 13, 2011

Celestron CGE Pro 1100 HD Computerized Telescope 11093

!9# Celestron CGE Pro 1100 HD Computerized Telescope 11093


Rate : | Price : $7,999.00 | Post Date : Nov 13, 2011 15:51:30
Usually ships in 3-5 weeks

Celestron CGE Pro 1100 HD Computerized Telescope 11093

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Thursday, November 3, 2011

Celestron EdgeHD 925 CGE Pro Schmidt-Cassegrain Telescope

!9#Celestron EdgeHD 925 CGE Pro Schmidt-Cassegrain Telescope

Brand : Celestron
Rate :
Price : $6,299.00
Post Date : Nov 03, 2011 08:16:38
Usually ships in 3-5 weeks



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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Monday, October 24, 2011

Celestron CPC 1100 StarBright XLT GPS Schmidt-Cassegrain 2800mm Telescope with Tripod and Tube

!9# Celestron CPC 1100 StarBright XLT GPS Schmidt-Cassegrain 2800mm Telescope with Tripod and Tube

Brand : Celestron | Rate : | Price : $2,999.00
Post Date : Oct 24, 2011 23:08:38 | Usually ships in 24 hours


Celestron CPC-1100 (XLT) Telescope - ?New alignment technology -- ?Advanced engineering -- ?Bold new design -- ?Celestron's Professional Computerized (CPC) telescope series redefines everything that amateur astronomers are looking for-quick and simple alignment, unsurpassed optical quality, ease of set-up and use, ergonomics, enhanced computerization and, most important, affordability. -- The scope feature a 16-channel GPS system and SkyAlign Technology. Simply line the telescope up with three different stars and the telescope does the reset. The computer system provides access to a database of over 40,000 objects in the sky. The Starbright® XLT High Performance Optical System provides bright, clear views. The convenient remote hand control holder allows you to view information hands-free while using the scope. The scope's ergonomic design means you can comfortably lift and move the telescope from location to location. -- Other features include 2800mm f/10 focal length, 8x50mm finder scope with quick release bracket, dual fork arm mount, 40mm (59x) 1.25" Possl eyepiece, 1.25" star diagonal, 1.25" visual back, 23' tube length. 2-year warranty

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Tuesday, October 11, 2011

The Gregorian Telescope - The First Practical Reflector

!9# The Gregorian Telescope - The First Practical Reflector

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The Gregorian Telescope is an interesting design of reflector and it was the first practical design for a telescope that used a mirror. It is still used in modern times but only in very limited circumstances.

Credit for the first reflector goes to an Italian professor named Niccolo Zucchi. He made his first scope in 1616 but the design of his scopes was not very practical. James Gregory was a Scottish Mathematician and Astronomer of the 17th Century and he is credited with having designed the first practical reflector telescope. In 1663 he published this design in his book titled Optica Promota. But he didn't build the first working model until ten years later with the help of scientist Robert Hooke. It was in this ten year period that Sir Isaac Newton built his famous Newtonian telescope (1670). So the Gregorian telescope predates the Newtonian in design but Newton's was the first to be built.

How the Gregorian Telescope works

To understand how the Gregorian reflector works we will first take a look at the Newtonian telescope. In the Newtonian a parabolic mirror placed at the bottom of a tube and it focuses light back up the tube to a flat mirror that directs it out the side of the tube to an eyepiece. The eyepiece is on the side of the tube. In a Gregorian design the parabolic mirror is at the bottom of the tube and it focuses light back up the tube but the second mirror is an ellipsoid and it redirects the light back down the tube to the eyepiece through a hole in the center of the large primary mirror. This type of telescope has the eyepiece at the bottom.

The benefits and shortcomings

Newton's telescope has one parabolic mirror and one flat mirror while Gregory's has a parabolic as its primary mirror and an ellipsoid as its secondary. Additionally, Gregory's primary mirror needed a hole cut in the center of it. These things mean it is a much more optically complex instrument and much more difficult to make. Newton's design is much easier to make. This is probably why it took Gregory ten years to make his first working model.

The Gregorian does have some benefits over the Newtonian style scope. The ellipsoid secondary mirror is placed at a point after the focus of the light. This configuration, in conjunction with an eyepiece, provides an erect or right side up image while the Newtonian telescope gives an upside down image. This is a big benefit if you are using the telescope for terrestrial viewing. And because of this inversion of image after the secondary mirror it allows a baffle to be placed inside the tube. This baffle prevents unwanted light and heat from reaching the primary mirror. This is a very useful tool when a telescope is meant to be used for solar observations where heat is a big concern. For this reason the Gregorian design is sometimes still used for telescopes that will be used for solar observations.

The Gregorian design for a telescope is not used very often in modern times. It has been changed and much improved by the Cassegrain telescope. But the Gregorian does find limited use occasionally as a finder scope that accompanies a larger scope. This is because of the nature of it displaying properly oriented erect images. And because of its ability to have a baffle inside it is also sometimes used for telescopes built for solar observations.

Gregory's telescope design is not much used in modern times but it was the forerunner and inspiration for many of today's telescope designs.


The Gregorian Telescope - The First Practical Reflector

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Friday, September 30, 2011

Celestron EdgeHD 1100 CGEM Schmidt-Cassegrain Telescope

!9# Celestron EdgeHD 1100 CGEM Schmidt-Cassegrain Telescope

Brand : Celestron | Rate : | Price : $3,499.00
Post Date : Oct 01, 2011 00:24:35 | Usually ships in 2-3 business days

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.

  • Celestron 11" aperture aplanatic Schmidt-Cassegrain telescope produces astrograph-quality flat focal plane
  • EdgeHD coma-free Cassegrain optics and a built-in field flattener ensures sharp focus all the way to the edge of the field
  • Flexible tension clutches hold the mirror in place and reduce image shift when rotating the tube around the mount
  • Cooling vents located on the rear cell allow hot air to be released from behind the primary mirror
  • All EdgeHD optical tubes are Fastar compatible for imaging down to f/2 with optional accessories

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Thursday, September 22, 2011

Celestron CGEM 1100 - 11" SCT Telescope on CGEM Equatorial Mount 11099

!9# Celestron CGEM 1100 - 11" SCT Telescope on CGEM Equatorial Mount 11099


Rate : | Price : $3,399.00 | Post Date : Sep 22, 2011 08:37:02
Usually ships in 1-2 business days


Celestron's CGEM-1100 features Celestron's high-end 11" Schmidt Cassegrian OTA with XLT coatings mounted on our brand new CGEM mount.

The 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

* Ultra Sturdy 2" steel tripod with Accessory Tray * Star diagonal provides more comfortable viewing position when observing objects that are high in the sky * 40,000 object database with 400 user-definable objects and expanded information on over 200 objects * Proven NexSt

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