Celestron 11 Rowe-Ackermann Schmidt Astrograph -RASA Telescope - OTA Only

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    The Celestron 11" RASA Telescope is an astrophotography telescope that delivers an incredibly fast f/2.2 for shorter exposure times and improved tracking abilities compared to standard telescopes, specifically catered for long exposures. The RASA refers to Rowe-Ackermann Schmidt Cassegrain telescope that was previously only found in high end premium cameras. 

    To improve the images from this telescope, the Celestron 11" RASA Astrograph also features rare-earth glass for images with no aberration, field curvature or any other visual flaws. The telescopes also feature custom engineered linear brass focuser bearing that reduces image shift, and its integrated 12V MagLev fan reduces cooldown time while simultaneously blocking dust and air pollutants that interferes with image clarity. 

    Optical Design Rowe-Ackermann Schmidt
    Aperture 279 mm (11")
    Focal Length 620 mm (24.4")
    Focal Ratio 2.22
    Light Gathering Power (Compared to human eye) 1588x
    Resolution (Rayleigh) 0.49 arc seconds
    Resolution (Dawes) 0.41 arc seconds
    Back focus with included camera adapter 55 mm (2.16")
    Back focus from top of threaded collar 72.8 mm (2.86")
    Optical Tube Aluminium
    Optical Tube Length 838.2mm
    Finderscope Not included
    Optical Tube Weight 19.5kg
    Included items 42 mm (1.65") T-thread camera adapter, 48 mm (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.

    Product Code: CLS-91075

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