Loading Please Wait...  Loading... Please wait...
  • Image 1



This kit combines the 8” Rowe-Ackermann Schmidt Astrograph (RASA) with the strong-yet-portable Advanced VX (AVX) German equatorial mount. Simply add a mirrorless camera and this package offers everything you need to take spectacular images of wide-field deep sky objects.

RASA Performance Made for Everyone

Capture spectacular wide-field deep sky images in seconds with Celestron’s new portable astrograph, the 8” Rowe-Ackermann Schmidt Astrograph (RASA). This incredibly fast f/2.0 system is the perfect companion to today’s color astronomical CMOS cameras, smaller CCD cameras, and mirrorless cameras. Thanks to its fast focal ratio and patented optical design, you can produce sharp, detailed images and, in many cases, skip the autoguider completely. Weighing in at just 17 pounds, it’s easy to transport your 8” RASA to the most remote dark sky locations.

RASA Performance Made for Everyone

The 8” RASA is an imaging telescope that delivers a flat field without optical aberrations for razor sharp stars across a wide field of view. It can capture stunning deep-sky astronomical images without the challenges typically presented by longer focal length instruments at a fraction of the cost of those systems.

The latest addition to the RASA family, this 8” version is a much more portable and affordable version of the heralded RASA 11, which was introduced to much acclaim in 2014. With the 8” RASA joining the lineup, a wider range of astroimagers can enjoy the benefits of the RASA design. It has many of the same thoughtfully designed features as its “big brother” RASA 11, including the integrated air-cooling system, internal filter mount, and sturdy CGE dovetail mounting bar.

Purely designed for imaging, the 8” RASA cannot be used visually. The prime focus focal plane is located at the front of the optical system, so it cannot accommodate a traditional eyepiece.

Shorter Exposure Times and Virtual “Real-Time” Observing

Since it is an F/2.0 optical system, imagers can use shorter exposure times to capture detail in faint objects. When combined with sensitive cameras and the proper “live stacking” software, the 8” RASA can provide an almost real-time observing experience. View images on a computer instantly that are brighter and more detailed than can be seen in much bigger telescopes with the naked eye.

Because shorter exposure times are possible, your equatorial mount won’t need to accurately track over extended periods. The 8” RASA’s relatively short 400mm focal length also lessens equatorial tracking demands. In many cases, autoguiding will not be required. Weighing only 17 lb, this optical tube pairs perfectly with a wide variety of mounts.

Ultra-Stable Focus System

With the launch of the 8” RASA, Celestron is unveiling a new focuser design that mitigates lateral movement of the primary mirror when focusing, slewing, or tracking with the astrograph. Focusing is easier, more accurate, and more stable than ever. The key to the Ultra-Stable Focus System is two sets of precision bearings that are precisely aligned and tested during assembly to ensure optimal results.

Built for Today’s Latest Cameras

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. It is optimized for sensors with up to a 22mm diagonal, but performs well with sensors up to 32mm diagonal. The APS-C sized sensors used in many mirrorless cameras are a good choice. 42mm full frame sensors will also work, but performance will be poor at the edges of the sensor and field illumination will be reduced. Additionally, we do not recommend pairing RASA 8 with any camera body more than 4” in diameter. See the chart below to determine if your camera is compatible with RASA 8.

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 plates (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)

Product Reviews

Free Shipping Rules


Recent Updates

Sign up to get our newsletter