Rowe-Ackermann Schmidt Optical Design – 8” f/2.2 flat field imaging system with rare-earth glass for outstanding images free of optical defects 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 astrograph does not work with standard DSLR cameras.
Ultra-Stable Focus System – six precision sealed ball bearings virtually eliminate image shift.
Integrated air-cooling system –12V DC MagLev fan reduces cooldown time and provides optimal air flow while filtering out dust.
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.
Advanced VX, the most compact and portable of Celestron’s German equatorial mounts, offers a maximum instrument capacity of 30 lb with the same rigidity as our larger mounts and minimal flexure.
This mount offers every feature an astroimager wants: PEC, an autoguider port, the ability to image across the meridian, and more.
NEW dual saddle plate accommodates both the narrow CG-5 and larger CGE dovetail.
Accessories included: M42 camera adapter, C-thread camera adapter, and fan battery pack.

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	30 lbs (13.6 kg)
Height adjustment range (includes mount and tripod)	1118mm - 1626mm (44" – 64")
Tripod Leg Diameter	50.8mm (2") Stainless Steel
Latitude adjustment range	7° - 77°
Mount Head Weight	17 lbs (7.71 kg)
Accessory Tray	Yes
Tripod Weight	18 lbs (8.16 kg)
Weight of Counterweights	1 x 12 lbs
Slew Speeds	9 slew speeds - max speed 4°/second
Tracking Rates	Sidereal, Solar and Lunar
Tracking Modes	EQ North & EQ South
GPS	N/A
Dovetail Compatibility	Dual saddle plate (CG-5 and CGE saddle)
Number of Auxiliary ports	3 Aux ports (1 hand control and 2 AUX ports for optional accessories)
Autoguide port	Yes
USB Port	Yes, input on Hand Control
Power Requirements	12V DC 3.5A (tip positive)
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	NexStar+ hand control with LCD display, 19 fiber-optic backlit LED buttons
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	47 lbs (21.31 kg)
Included Items	Advanced VX Equatorial Head\| Tripod\| Accessory Tray\|1 x 12 lbs counterweight\| NexStar+ Hand Control\| DC Power Cable (plugs into cigarette lighter socket)

CELESTRON

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