OPTICAL TUBE INFO: | |
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Optical Design: | Rowe-Ackermann Schmidt Astrograph |
Aperture: | 203mm (8") |
Focal Length: | 400mm (15.74") |
Focal Ratio: | f/2.0 |
Central obstruction diameter: | 93mm (3.66") (46% of aperture diameter) |
Light Gathering Power (Compared to human eye): | 843x |
Resolution (Rayleigh): | 0.68 arc seconds |
Resolution (Dawes): | 0.57 arc seconds |
Image Circle: | 22mm (.86") Ø, 3.15° |
Useable field: | 32mm (1.26") Ø, 4.6°, only minimal performance loss at edge of FOV |
Wavelength range: | 390 - 800 nm |
Spot size: | < 4.6 μm RMS across image circle |
Optical Coatings: | StarBright XLT |
Off-axis Illumination: | 93% at 11mm (.43") off-axis |
Optical Window: | 46mm (1.81") Ø |
Back focus with included camera adapter: | 25mm (.98") |
Back focus from top of threaded collar: | 29mm (1.14") |
Optical Tube: | Aluminum |
Optical Tube Length: | 628mm (24.7") |
Optical Tube Diameter: | 235mm (9.3") |
Focuser: | Ultra-Stable Focusing System |
Finderscope: | Not included |
Optical Tube Weight: | 17 lbs (7.7 kg) |
Other Features: | Air-cooling system, integrated filter mount |
Included items: | M42 camera adapter, C-thread camera adapter, fan battery pack |
Dovetail: | CGE Dovetail Bar |
MOUNT INFO: | |
Mount Type: | Computerized Equatorial |
Instrument load capacity: | 40 lbs (18 kg) |
Height adjustment range (includes mount and tripod): | 1346mm - 1651mm (53" – 65") |
Tripod Leg Diameter: | 50.8mm (2") Steel tripod with graduated markings on lower section |
Latitude adjustment range: | 15° - 70° |
Mount Head Weight: | 40 lbs (18.14 kg) |
Accessory Tray: | Yes |
Tripod Weight: | 20 lbs (9 kg) |
Weight of Counterweights: | 1 x 17 lbs |
Slew Speeds: | 9 slew speeds - max speed 4.5°/second |
Tracking Rates: | Sidereal, Solar and Lunar |
Tracking Modes: | EQ North and EQ South |
GPS: | N/A |
Dovetail Compatibility: | Dual saddle plates (CG-5 and CGE saddle) |
Number of Auxiliary Ports: | 2 AUX Ports (1x Hand control Port and 1x AUX Port for optional accessories) |
Autoguide Port: | Yes |
USB Port: | Yes, input on Hand Control |
Power Requirements: | 12V DC, 3.2 amps |
Motor Drive: | DC servo motors |
Alignment Procedures: | 2-Star Align, 1-Star Align, Solar System Align, Last Alignment, Quick Align |
Periodic Error Correction: | Yes |
Computerized Hand Control: | 2 line x 18 character backlit Liquid Crystal Display, 19 LED backlit buttons, USB 2.0 Port for PC connection |
NexStar+ Database: | 40,000+ objects, 100 user defined programmable objects Enhanced information on over 200 objects |
Software: | Celestron Starry Night Special Edition Software | SkyPortal App |
Total Kit Weight: | 95 lbs (43 kg) |
Included Items: | CGEM II Equatorial Head |Tripod | Accessory Tray | 1 x 17 lbs counterweight | NexStar+ Hand Control | DC Power Cable (item#18769) | Hand Control Holster |
Solar Warning |
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