OVERVIEW
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 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 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 an Autoguider
- NexRemote telescope control software and RS-232 cable included for advanced control of your telescope via computer
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 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 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 an 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) | 235 mm (9.25 in) |
Focal Length | 2350 mm (93 in) |
Formula:Focal Ratio | 10 |
Focal Length of Eyepiece 1 (mm) | 23 mm (0.91 in) |
Formula: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 |
Formula:Highest Useful Magnification | 555 x |
Formula:Lowest Useful Magnification | 34 x |
Formula:Limiting Stellar Magnitude | 14.4 |
Formula:Resolution (Rayleigh) | 0.59 arc seconds |
Formula:Resolution (Dawes) | 0.49 arc seconds |
Formula:Light Gathering Power (Compared to human eye) | 1127 x |
Apparent Field of View | 0.8 ° |
Secondary Mirror Obstruction | 3.35 in (85 mm) |
Formula:Secondary Mirror Obstruction by Diameter | 36% |
Formula: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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