Celestron 36cm RASA - OTA Only

OUR PRICE $24,999.00
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    The Rowe-Ackermann Schmidt Astrograph (RASA), is a cost-effective optical system for space surveillance, Space Situational Awareness (SSA), and advanced wide field astroimaging. SSA is the devotion of monitoring space environment and protecting our satellites from debris by detecting and mapping space junk in orbit. In no small way, the RASA helps SSA make our globally connected way of life possible!

    It offers unprecedented value in aperture, speed, field of view, and optical performance. Its sleek design has a convenient external prime-focus image capture location with a flat focal plane, providing small spot sizes to the edge of a wide field. The result is images free of optical defects like field curvature, off-axis coma, and astigmatism.

    The 14" aperture version 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 36cm focuses an extended spectral range (400-900 nm), allowing a brighter signal to be detected by camera sensors. The 36 RASA also features a redesigned focus system, which ensures easy and stable focusing. Its ample back-focus distance (77.5 mm) accommodates a wide variety of imaging sensors.


    Additional Features:

    • Celestron’s proprietary XLT coatings, consisting of high-transmission multi-coatings for lenses and high reflectivity aluminum coatings, ensure good light throughput for the optical system
    • Integrated cooling fan helps optics cool down to ambient temperature and pulls air through vents with micromesh to prevent dust ingress
    • Dual dovetail bars offer flexibility to mount the optical tube and conveniently attach additional accessories. Accomodates “CGE/Losmandy” style dovetails.
    • Two sets of 2x threaded insert holes in the rear cell provide additional mounting options
    • Carrying handles on the rear cell for you to move and mount your optical tube with ease 
    • 3x sets of push-pull screws (not usually needed) to adjust the lens group to achieve optical alignment for the entire system
    • Includes M48 camera adapter
    • Motor system specifically designed for the RASA 36; Focuser is manufactured by Starlight Instruments

    Optical Tube Info: 

    Optical Design

    Rowe-Ackermann Schmidt Astrograph


    36cm / 355.6mm (14")

    Focal Length

    790mm (31.1")

    Focal Ratio


    Central obstruction diameter

    158mm (6.22")

    Resolution (Rayleigh)

    0.39 arc seconds

    Resolution (Dawes)

    0.36 arc seconds

    Image Circle

    60.1mm (2.36") Ø, 4.4°

    Useable Field

    70mm (2.75") Ø, 5.1°, only minimal performance loss at edge of FOV

    Wavelength Range

    400 – 900 nm

    Spot Size

    < 6.3 μm RMS across FOV

    Optical Coatings

    Enhanced aluminum, StarBright XLT multi-coatings used throughout

    Off-Axis Illumination

    83% at 30mm (1.18") off-axis

    Optical Window

    104mm (4.09") Ø

    Back focus with included camera adapter 

    55mm (2.16")

    Back focus from top of threaded collar

    77.5mm (3.05")

    Optical Tube


    Optical Tube Length

    1079.5mm (42.5")

    Optical Tube Diameter

    406.4mm (16")


    New focuser design, minimizes focus shift


    Not included

    Optical Tube Weight


    Other Features

    • Ventilation fan
    • Dual dovetail mounting bars

    Included Items

    • 48mm (1.89") camera adapter
    • Fan battery pack

    About Celestron
    Celestron was founded by Tom Johnson whose first telescope design was a simple 6-inch reflector, built for his young son. He gradually progressed to making larger scopes in more sophisticated designs. Today, the Celestron company is an industry leader in designing and manufacturing optical equipment including telescopes (computerised and non-computerised), binoculars, spotting scopes and its accompanying accessories. Celestron's legacy spans 50 years, and has grown to enjoy recognition from amateurs to serious astronomers globally. The company seeks to remain innovative by growing its product offerings, while supporting science education around the world.

    More Information
    Product Flag New
    Electronic Hand Control No
    Motor Drive No
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