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:
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.
California Residents	View Proposition 65 Warning

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Celestron RASA 11" Rowe-Ackermann Schmidt Astrograph V2 OTA

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