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CGEM II 800 ROWE-ACKERMANN SCHMIDT ASTROGRAPH (RASA) Telescope

₹405,623.00 excl. 18% GST

  • Flat field free of optical aberrations like field curvature, coma, astigmatism and chromatic aberration across an entire APS-C sensor.
  • Unlike the larger RASAs that work with DSLR and large CCD cameras, the 8” model was designed with color astronomical CMOS cameras, smaller CCD cameras, and mirrorless cameras in mind. The Telescope does not work with standard DSLR cameras.
  • NEW Ultra-Stable Focus System – six precision sealed ball bearings virtually eliminate image shift.
  • Internal filter mount – seamlessly accommodates a Light Pollution Imaging Filter into the optical path.
  • Performs over a wider spectral range than most Telescopes, from 390 – 800 nm, so more of the light passing through the astrograph is in sharp focus.
  • The CGEM II, with its 40 lbs load capacity, is the latest update to the venerable CGEM mount and provides a sturdy and rigid platform for the fully-loaded RASA 8.
  • The drive system, consisting of low cog DC Servo motors with integrated optical encoders, steel worm gears supported by precision sealed bearings, and brass worm wheels, ensures smooth and accurate slewing and tracking.
  • Proven NexStar+ computerized Telescope control technology supports functions to address imagers’ needs, such as All-Star Polar Alignment, Permanent Periodic Error Correction (PPEC), and adjustable tracking through meridian.

Available on backorder

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OPTICAL TUBE INFO:
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 & 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’s 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

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