EdgeHD 8 Optical tube

R30,775.00

EdgeHD 8 Optical tube
Specifications
  • 8" EdgeHD Optical Tube Assembly
  • Aluminum Optical Tube
  • Celestron's premium StarBright XLT coatings
  • 2032 mm focal length (f/10)
  • 40 mm eyepiece included (51x)
  • Visual back allows for use with 1.25" accessories
  • 9x50 finderscope to help accurately find objects
  • Star diagonal provides more comfortable viewing position when observing objects that are high in the sky
  • Mirror Support Knobs hold the mirror in place and reduces image shift during imaging.
  • Tube vents with integrated 60 micron mesh filter allowing hot air to be released from behind the primary mirror.
  • Fastar Compatible optical tubes are equipped with a removable secondary mirror for fast f/2 ccd imaging
  • Includes dovetail rail compatible with CGE mount

Optical Design: EdgeHD 
Aperture (mm): 203.2 mm (8 in) 
Focal Length: 2032 mm (80 in) 
Focal Ratio: 10 
Focal Length of Eyepiece:  1 (mm):40 mm (1.57 in) 
Magnification of Eyepiece 1:51
Finderscope: 9x50 
Star Diagonal: 1.25 
Optical Tube: Aluminum 
Highest Useful Magnification: 480 x 
Lowest Useful Magnification: 29 x 
Limiting Stellar Magnitude: 14 
Resolution (Rayleigh): 0.69 arc seconds 
Resolution (Dawes): 0.57 arc seconds 
Light Gathering Power (Compared to human eye): 843 x 
Secondary Mirror Obstruction: 2.7 in (69 mm) 
Secondary Mirror Obstruction by Diameter: 34 % 
Secondary Mirror Obstruction by Area: 11 % 
Optical Coatings: StarBright XLT 
Optical Tube Length: 17 in (432 mm) 
Optical Tube Weight: 14 lbs (6.35 kg) 
Dovetail Compatibility: CGE Mount

SEE THE UNIVERSE IN HD
Introducing Celestron's New Aplanatic Schmidt Telescope Design!
•Visibly Sharper Images
•Superior Performance
•Enhanced Mechanical Features
•Fastar® Compatible

EdgeHD is an aplanatic Schmidt telescope designed to produce aberration-free images across a wide visual and photographic field of view. The optical system was designed to reduce more than just off-axis star coma, but also to give an astrograph quality flat focal plane all the way to the edge of the field of view.

True Astrograph Quality

Many optical designs that advertise themselves as "astrograph" quality actually only produce pinpoint stars across a curved focal plane. While this may be acceptable for visual observing, stars will appear out of focus at the edge when used with a flat chip sensor of a digital camera. EdgeHD optics produce a focal plane more than three-times flatter than a standard Schmidt Cassegrain telescope and dramatically flatter than other competing coma-free designs. This guarantees you visibly sharp stars across some of the largest CCD chips available today.
Improved Performance
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. Starbright XLT® Coatings coupled with Celestron's StarBright XLT coating group on every surface, EdgeHD optics gives you maximum light throughput across the widest visual and photographic spectrum.

Mechanical Features
In addition to Celestron’s new optimized optical design, the EdgeHD tube has been redesigned to make sure you get the most from your optics each and every night.
Mirror Clutches - Flexible tension clutches hold the mirror in place and reduce image shift when rotating the tube around the mount. The flexible rods allow the mirror to be held in place without putting any force or pressure on the mirror assembly, keeping the image centered in the eyepiece (or chip).
Tube Vents - Cooling vents located on the rear cell allow hot air to be released from behind the primary mirror. Each vent has an integrated 60 micron micro-mesh filter guaranteed to let warm air out without letting dust in.
Fastar Versatility - The EdgeHD is the most versatile imaging scope available today. At its native f/10 you can achieve the image scale necessary to capture the smallest of deep sky objects. With the optional reducer lens (coming soon) you can increase your field of view without sacrificing optical performance. A barlow gives you the added power for high resolution planetary, lunar and solar imaging. And of course all EdgeHD optical tubes are Fastar® compatible for ultra fast f/2 wide field imaging. Each tube has been fitted with a removable secondary mirror and are opto-mechanically aligned on a laser bench to ensure they are axially symmetric in any configuration.

 Pre-order:

The physical stock of this product is kept at the official importer.  Our latest information is that there is stock, but upon receipt of an order we will confirm availability of stock at the importer, typically within 24 hours.  If available, the product will only be ordered from the importer upon receipt of the full purchase price.  Delivery to our office is typically 2 to 4 working days.  Availability typical 2 to 4 days

Note:  The price on our website is based upon the latest price list received from the importer and should be correct.  However, there may be delays before our online price reflects the updated price.  We will honour the price as far as possible, but reserve the right to review the price.



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  • Model: CE_C91030_XLT
  • 0 Units in Stock
  • Manufactured by: Celestron


This product was added to our catalog on Wednesday 09 July, 2014.

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