Description
- A Winning Astrophotography Kit – Combine the legendary 8″ Rowe-Ackermann Schmidt Astrograph with two must-have filters—the Light Pollution Reduction Filter and the Hα-Hβ-OIII Filter—for a blazing-fast f/2.0 system that can produce stunning images of a wide array of astroimaging targets.
- Ultra-fast Rowe-Ackermann Schmidt f/2.0 Optics – Don’t spend hours capturing your images—with RASA 8’s f/2.0 optical system, you can gather the same image brightness 25 times faster than an f/10 system. And RASA 8 images aren’t just bright and full of detail; they’re also free from optical defects like field curvature, coma, astigmatism, and chromatic aberration.
- Patented Technology that Researchers Trust – Beyond imaging, RASA is the perfect tool for detecting errant space junk and asteroids. Scientists and government agencies use RASA arrays to monitor the space environment and protect our satellites.
- Built for Today’s Cameras – Designed with color astronomical CMOS cameras, smaller CCD cameras, and mirrorless cameras in mind, RASA 8’s flat field provides pinpoint stars and excellent performance across an entire APS-C sensor.
- Ultra-Stable Focus System – A precision linear ball bearing virtually eliminates image shift. RASA performs over a wider spectral range than most telescopes, from 400 nm to 800 nm, so more of the light passing through the astrograph is in sharp focus.
- Includes Two RASA Imaging Filters – When you purchase this kit, your RASA is ready to handle a variety of imaging targets and observing conditions right out of the box. The Light Pollution Reduction Filter and Hα-Hβ-OIII Filter enhance your images of faint targets like nebulae by blocking light pollution, improving image contrast, and darkening the sky background. Celestron engineers designed each filter to fit seamlessly into RASA 8’s optical path.
Specifications
| 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: | 400 – 800 nm |
| Spot size: | < 2.3 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: | Precision Bearing System (PBS) |
| Finderscope: | Not included |
| Optical Tube Weight: | 17 lbs (7.7 kg) |
| Other Features: | Air-cooling system, integrated filter mount |
| Included items: | 42mm (1.65″) T-thread camera adapter | C-thread camera adapter | Fan battery pack | Light Pollution Imaging Filter | Hα-Hβ-OIII Imaging Filter |
| Dovetail: | CGE Dovetail Bar |
| Additional Information | |
| Solar Warning |
|
| California Prop 65 |
WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov
|
