Celestron 11" Rowe-Ackermann Schmidt Astrograph f/2.2 OTA - Version 1

ITEM #
CE-91075
  • This 11-inch Astrograph was built for speed!
  • Focal Ratio: f/2.22.
  • Rare Earth Glass: Perfect Color, Coma-Free, Field Curvature Free.
  • 43.3 mm Image Circle.
  • 2 Year Warranty!
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  • Regular price $5,949.95
  • $2,895.00
  • You save: $3,054.95 (51%)

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Celestron 11" Rowe-Ackermann Schmidt Astrograph f/2.2 OTA - Version 1


The Celestron 11-inch RASA OTA combines speed with performance. Based on the original Schmidt camera design, the RASA optical tube offers significant advantages by providing a short focal length for a relatively large aperture. Experience essentially perfect imaging with this Celestron astrograph. 

The Celestron RASA offers an exceptionally sharp 43.3 mm image circle that accommodates large sensors. Its large image circle creates an exceptional wide-field, allowing you to fill even the largest imaging chips with edge-to-edge pinpoint stars with minimal vignetting. 

Fast Astrograph Optical System

Its short focal length provides a wide-field f/2.2 system, offering the advantage of better apparent tracking. With only a 620 mm focal length, exposure times are also greatly reduced when compared to traditional Schmidt Cassegrain telescopes. You'll be capturing better images in a fraction of the time, without the need of an autoguider!

Excellent Clarity and Flat FoV

The Rowe-Ackermann scopes are perfect for creating giant night sky mosaics, surveying, and comet hunting. Designed with 4-element rare-earth glass, images are free of false color, coma, and field curvature. Optical quality this excellent has been unheard of in astrographs within this price range.

Below you'll see an incredible image of the Rosette Nebula taken by Jason Guenzel using the Triad Ultra on the super-fast f/2.2 Celestron RASA telescope! 

Jason Guenzel Nebula with RASA and Triad Ultra

Designed for Peak Performance

Engineered as a complete astro-imaging system, every component of the Rowe-Ackermann Schmidt Astrograph is optimized for peak performance with DSLR and astronomical CCD cameras. Down to the thickness of the glass used in the included fully multi-coated optical window or an optional imaging filter, every component of the system has been taken into careful consideration to work together seamlessly.

Celestron RASA Highlighted Features

  • StarBright XLT fully multi-coated optical system.
  • A custom engineered linear brass focuser bearing.
  • FeatherTouch Micro Focus Knob allows you to make the fine adjustments you need to capture the perfect shot. 
  • A 12V MagLev fan reduces cool-down time and provides optimal airflow through the dust filtered optical tube.
Includes M48 and T-Thread camera adapters and 2 year Celestron warranty.

SPECIFICATIONS

Aperture279 mm (11")
Back Focus72.8mm
Camera/Eyepiece ConnectionMale T—Thread (M42x0.75)
Corrected Image Circle43.3mm
Dawes Limit0.42 arcseconds
Focal Length620 mm
Focal Ratiof/2.2
Free ShippingYes
Hightest Magnification558x
Light Gathering Power1589x
Limiting Magnitude16
Optical DesignRowe Ackermann Schmidt Astrograph
RMS Spot Size4.4 microns
Secondary Obstruction114mm
Tube Diameter838mm
Tube Length330mm
Tube Weight43 lbs

INCLUDED ITEMS

  • Celestron 11-inch RASA Astrograph OTA.
  • M48 Camera Adapter.
  • 42 mm T-Thread Camera Adapter.
  • 2 Year Warranty.

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