Celestron RASA 11" Rowe-Ackermann Schmidt Astrograph V2 OTA
The Celestron RASA 11" Rowe-Ackermann Schmidt Astrograph V2 OTA revolutionizes deep-sky astroimaging, offering advanced features tailored for modern CCD and DSLR cameras. This 11-inch, fast, wide-field f/2.2 optical system utilizes...
The Celestron RASA 11" Rowe-Ackermann Schmidt Astrograph V2 OTA revolutionizes deep-sky astroimaging, offering advanced features tailored for modern CCD and DSLR cameras. This 11-inch, fast, wide-field f/2.2 optical system utilizes rare-earth glass, eliminating false color, coma, and field curvature for pristine images.
Key Features:
- Optimized Image Circle: With a large 43.3mm image circle, it ensures sharp stars across the field, even on large astroimaging sensors, extending up to 52mm for larger formats.
- Ultra-Stable Focus System (USFS): Newly integrated USFS minimizes focus shift and mirror flop, enhancing image stability and clarity.
- Advanced Cooling System: Features a high-output 12V MagLev fan with dust filters, ensuring rapid cooling and clean optics.
- Versatile Camera Compatibility: Includes standard camera adapters (T-thread and M48) for easy attachment to popular CCD and DSLR cameras.
Ideal for Diverse Astroimaging Needs:
- Wide-Field Imaging: Its 620mm focal length is perfect for capturing large sky areas, creating vast sky mosaics, or comet tracking.
- High-Quality Optics: Four-element rare-earth glass delivers images free from chromatic aberrations, ensuring high-quality results.
- Efficient Imaging: The fast f/2.2 system allows for shorter exposures, reducing the need for extended tracking and often eliminating the necessity for autoguiding.
Advanced Design for Peak Performance:
- Minimized Vignetting: The optical design ensures minimal light fall-off at the edges.
- Optimized for Modern Imaging: Engineered to perform seamlessly with today’s top imaging equipment, every component enhances the astroimaging experience.
- Accessory Friendly: Dovetail CGE bars facilitate easy mounting of accessories like a guidescope.
Whether you're surveying the night sky, hunting comets, or capturing expansive celestial images, the Celestron RASA 11" V2 is a powerhouse, delivering unparalleled performance and versatility to astrophotographers and enthusiasts alike.
Specifications
OPTICAL TUBE INFO: | |
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Optical Design: | Rowe-Ackermann Schmidt Astrograph |
Aperture: | 279mm (11") |
Focal Length: | 620mm (24.4") |
Focal Ratio: | f/2.2 |
Central obstruction diameter: | 114mm (4.48") (41% of aperture diameter) |
Light Gathering Power (Compared to human eye): | 1588x |
Resolution (Rayleigh): | 0.49 arc seconds |
Resolution (Dawes): | 0.41 arc seconds |
Image Circle: | 43.3mm (1.7") Ø , 4.0° |
Useable field: | 52mm (2.04") Ø , 4.8° only minimal performance loss at edge of FOV |
Wavelength range: | 400 - 700 nm |
Spot size: | < 4.4 μm RMS across FOV |
Optical Coatings: | StarBright XLT |
Off-axis Illumination: | 83% at 21mm (0.82") off-axis |
Optical Window: | 68mm (2.67") Ø |
Back focus with included camera adapter: | 55mm (2.16") |
Back focus from top of threaded collar: | 72.8mm (2.86") |
Optical Tube: | Aluminum |
Optical Tube Length: | 838.2mm (33") |
Optical Tube Diameter: | 330.2mm (13") |
Focuser: | Ultra-Stable Focus System |
Finderscope: | Not included |
Optical Tube Weight: | 43 lbs (19.5 kg) |
Other Features: | Ventilation fan, dual dovetail mounting bars |
Included items: | 42mm (1.65") T-thread camera adapter | 48mm (1.89") camera adapter | Dust cover | Fan battery pack |
Dovetail: | CGE Dovetail Bar |
Solar Warning |
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California Residents | View Proposition 65 Warning |