Description
#11008
5,800.00 $ 4,860.00 $
EdgeHD Whitepaper
The Celestron Product Development team has released a whitepaper outlining the technology behind EdgeHD. This paper describes the development goals, design decisions, optical performance, and their practical realization in 8-, 9.25-, 11-, and 14-inch apertures. We include cross-sections of the EdgeHD series, comparative spot diagrams for the EdgeHD and competing “coma-free” Schmidt-Cassegrain designs, a table with specifications for visual and imaging, graphics showing how to place sensors at the optimum back-focus distance, and details on the construction and testing of the EdgeHD telescope series.
# 11008
Click here to download the whitepaper.
Optical Design | EdgeHD |
---|---|
Aperture (mm) | 235 mm (9.25 in) |
Focal Length | 2350 mm (93 in) |
Focal Ratio | 10 |
Focal Length of Eyepiece 1 (mm) | 23 mm (0.91 in) |
Magnification of Eyepiece 1 | 102 x |
Finderscope | 50 mm Finderscope with quick release bracket |
Star Diagonal | 2″ w/1.25″ adapter |
Mount Type | Dual Fork Arm |
Accessory Tray | Die Cast Aluminum Leg Brace / Eyepiece holder |
Tripod | Heavy Duty Stainless Steel Adjustable |
Power Requirements | Car battery adapter |
Highest Useful Magnification | 555 x |
Lowest Useful Magnification | 34 x |
Limiting Stellar Magnitude | 14.4 |
Resolution (Rayleigh) | 0.59 arc seconds |
Resolution (Dawes) | 0.49 arc seconds |
Light Gathering Power (Compared to human eye) | 1127 x |
Apparent Field of View | 0.8 ° |
Secondary Mirror Obstruction | 3.35 in (85 mm) |
Secondary Mirror Obstruction by Diameter | 36% |
Secondary Mirror Obstruction by Area | 13% |
Optical Coatings | Starbright XLT Coating |
Total Telescope Kit Weight | 58 lbs (26 kg) |
Tracking Rates | Sidereal, Solar and Lunar |
Tracking Modes | Altazimuth, EQ North and EQ South |
Alignment Procedures | SkyAlign, Auto Two-Star Alignment, Two-star Align, SolarSystem Align, EQ North Align, EQ South Align, One-Star Align |
Periodic Error Correction | Permanently Programmable |
Communication Ports | RS-232 communication port on hand control |
Computer Hand Control | Double line, 16 character Liquid Crystal Display; 19 fiber optic backlit LED buttons |
Database | 40,000+ objects, 100 user defined programmable objects. Enhanced information on over 200 objects |
GPS | Internal 16 channel |
Warranty | 2-year Telescope Warranty |
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