DESCRIPTION
GENERAL FEATURES
- EdgeHD Optics
- Celestron's premium StarBright XLT coatings
- Fully computerized dual fork arm Altazimuth mount
- 50 mm finderscope to help accurately find objects
- Heavy-duty tripod makes attaching the telescope so easy you can do it in the dark; also features sturdy 2"; stainless steel legs and aluminum accessory tray
- 23 mm, 82 degree Luminos Eyepiece - 2"
- Ergonomic design allows you to comfortably lift and move the telescope from location to location
- Star diagonal provides a more comfortable viewing position when observing objects that are high in the sky
- Convenient remote hand control holder holder allows you to view information hands-free while using the scope
- Mirror Support Knobs hold the mirror in place and reduce image shift during imaging
COMPUTERIZED MOUNT FEATURES
- Proven NexStar computer control technology
- SkyAlign allows you to align on any three bright celestial objects, providing a fast and easy alignment process
- 40,000 object database with over 100 user-definable objects and expanded information on over 200 objects
- Custom database lists of all the most famous deep-sky objects by name and catalog number; the most beautiful double, triple and quadruple stars; variable stars; solar system objects and asterisms
- Re-designed drive base and drive mechanics with spring loaded RA worm block with enveloping brass teeth
- Re-designed electronics deliver constant regulated power to the motors making them capable of driving the telescope even when not perfectly balanced
- Computer assisted All-Star polar-alignment
- Flash upgradeable hand control software and motor control units for downloading product updates over the Internet
- Permanent PEC
- Auxiliary port for additional accessories such as Autoguider
- NexRemote telescope control software and RS-232 cable included for advanced control of your telescope via computer
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.
SPECIFICATIONS
| Optical Design | EdgeHD | 
| Aperture (mm) | 280 mm (11 in) | 
| Focal Length | 2800 mm (110 in) | 
| Formula:Focal Ratio | 10 | 
| Focal Length of Eyepiece 1 (mm) | 23 mm (0.91 in) | 
| Formula:Magnification of Eyepiece 1 | 122 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 | 
| Formula:Highest Useful Magnification | 661 x | 
| Formula:Lowest Useful Magnification | 40 x | 
| Formula:Limiting Stellar Magnitude | 14.7 | 
| Formula:Resolution (Rayleigh) | 0.5 arc seconds | 
| Formula:Resolution (Dawes) | 0.41 arc seconds | 
| Formula:Light Gathering Power (Compared to human eye) | 1600 x | 
| Apparent Field of View | 0.67 ° | 
| Secondary Mirror Obstruction | 3.75 in (95 mm) | 
| Formula:Secondary Mirror Obstruction by Diameter | 34% | 
| Formula:Secondary Mirror Obstruction by Area | 12% | 
| Optical Coatings | Starbright XLT Coating | 
| Total Telescope Kit Weight | 66 lbs (30 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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