Celestron RASA 36 cm f/2.2 Telescope OTA

  • Largest Aperture in the RASA Series!
  • 790 mm Focal Length.
  • f/2.2 Focal Ratio.
  • 4-element Lens Group Utilizes Extra-low Dispersion (ED) Glass for Images Free of False Color, Coma, and Field Curvature.
  • Patented Catadioptric Astrograph Design.
  • StarBright XLT Optical Coating System.
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  • Regular price $22,399.95
  • $13,999.00
  • You save: $8,400.95 (37%)

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Celestron RASA 36 cm f/2.2 Telescope OTA

The 36 cm Rowe-Ackermann Schmidt Astrograph (RASA) OTA is a cost-effective optical system for space surveillance, Space Situational Awareness (SSA), other scientific applications, and provides advanced wide-field astro-imaging. It offers unprecedented value in aperture, speed, field of view, and optical performance. If you're looking for peak performance in your optical system, look no further than the Celestron RASA 36.

Designed for Excellence

The RASA design has a convenient external prime-focus image capture location with a flat focal plane. It provides small spot sizes to the edge of a wide field, resulting in images free of optical defects like field curvature, off-axis coma, and astigmatism.

Its 36 cm aperture is the largest RASA Celestron manufactures; it is the biggest and fastest (f/2.2) optical instrument of its kind available "off-the-shelf."
Unlike most telescopes, which only focus visible light (400-700 nm), the RASA 36 cm focuses an extended spectral range (400-900 nm), allowing a brighter signal to be detected by a camera sensor.

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

Focus with Ease

The RASA 36 cm also features a redesigned focus system, which ensures easy and stable focusing. RASA 36 cm has an ample back-focus distance (77.5 mm), accommodating a wide variety of imaging sensors. Add a custom camera adapter for a field of view up to 4.4 degrees!

Important Freight Requirement (Please Read)

RASA 36 is a professional-caliber, high-precision instrument. It is manufactured and aligned to an exacting standard to provide exceptional optical performance. The telescope has been packaged to ensure it retains alignment and resulting performance during transport. However, due to the weight, size, and known stresses of shipping via parcel service, Celestron has determined that the ideal transport is a palletized delivery via LTL truck freight. For all domestic deliveries, Celestron will ship via this method. We also require this shipping method for all deliveries from Celestron dealers to end customers.


Aperture355.6 mm (14")
Back Focus77.5mm
Camera/Eyepiece Connection36cm RASA Camera Adapter
Corrected Image Circle60mm
Dawes Limit0.33 arcseconds
Focal Length790 mm
Focal Ratiof/2.2
Free ShippingYes
Highest Magnification711.2x
Light Gathering Power2581x
Limiting Magnitude16.5
Optical DesignRASA
RMS Spot Size6.3 microns
Secondary Obstruction158mm
Tube Diameter406mm
Tube Length1080mm
Tube Weight75 lbs


  • Celestron 14-inch f/2.2 Rowe-Ackermann Schmidt Astrograph (OTA Only).
  • 48 mm T-Adapter.
  • Fan Battery Pack.
  • Limited 2-Year Warranty.