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:
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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.
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Ultra-Stable Focus System (USFS): Newly integrated USFS minimizes focus shift and mirror flop, enhancing image stability and clarity.
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Advanced Cooling System: Features a high-output 12V MagLev fan with dust filters, ensuring rapid cooling and clean optics.
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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:
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Wide-Field Imaging: Its 620mm focal length is perfect for capturing large sky areas, creating vast sky mosaics, or comet tracking.
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High-Quality Optics: Four-element rare-earth glass delivers images free from chromatic aberrations, ensuring high-quality results.
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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:
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Minimized Vignetting: The optical design ensures minimal light fall-off at the edges.
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Optimized for Modern Imaging: Engineered to perform seamlessly with today’s top imaging equipment, every component enhances the astroimaging experience.
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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 |
- Never look directly at the Sun with the naked eye or with an optic (unless you have the proper solar filter). Permanent and irreversible eye damage may result.
- Never use your optic to project an image of the Sun onto any surface. Internal heat build-up can damage the optic and any accessories attached to it.
- Never leave your optic unsupervised. Make sure an adult who is familiar with the correct operating procedures is with your optic at all times, especially when children are present.
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| California Residents |
View Proposition 65 Warning |
