Celestron RASA 11" Rowe-Ackermann Schmidt Astrograph V2 OTA

$4,399.00

  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...

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SKU: 91076
Availability: In Stock Pre order Out of stock
Categories: Celestron Celestron
Description

 

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:

  1. 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.
  2. Ultra-Stable Focus System (USFS): Newly integrated USFS minimizes focus shift and mirror flop, enhancing image stability and clarity.
  3. Advanced Cooling System: Features a high-output 12V MagLev fan with dust filters, ensuring rapid cooling and clean optics.
  4. 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:
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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