Celestron RASA 11 V2 Rowe-Ackermann Schmidt Astrograph Telescope - OTA Only

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The ultra-fast Celestron RASA 11" Rowe-Ackermann Schmidt Astrograph V2 is the OTA you didn't know you needed.


- 11" RASA (Rowe-Ackermann Schmidt Astrograph)

- Ultra-Fast & Wide-Field at f/2.2

- Constructed with 4-Element Rare-Earth Glass for Colour-Accurate Images Free of Coma & Field Curvature

- Integrated Air Cooling

- V2 Version with Ultra-Stable Focus System (USFS) to Minimise Mirror Flop & Focus Shift

- Large Optimised Circle (43.3mm) to Maintain Edge-to-Edge Clarity & Pinpoint Stars

- Celestron 2 Year Warranty

RRP $8,899.00 RRP OUR PRICE $7,699.00

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    The Celestron RASA 11" V2 is every astrophotographer's dream.

    The ultra-fast, ultra-wide Celestron RASA 11 V2 Rowe-Ackermann Schmidt Astrograph (OTA Only) is the perfect companion for serious astrophotography.

    With a focal ratio of f/2.2 and a focal length of just 620mm, the RASA 11 V2 is incredibly fast, offering wide-field images with a large 43.3mm optimised image circle. Expect edge-to-edge clarity, even with the largest astroimaging sensors with diagonals of up to 52mm wide. This combination ensures the RASA is an optical instrument capable of creating astonishing mosaics of the night sky for astrophotography, for surveying and even for comet hunting.


    Constructed with 4-element rare-earth glass.

    The RASA 11 utilises a Rowe-Ackermann Schmidt Astrograph optical design with 4-element rare-earth glass. As a result, images through a RASA are top-tier, free of false colour and aberrations such as coma or field curvature. The optical design ensures a remarkably small spot size and minimal vignetting - a result that is unprecedented for an astrograph in this price range.


    For advanced astrophotography.

    Celestron's RASA 11 V2 is a dedicated astrograph, with a number of advanced features for astrophotography. The V2 features the new Ultra-Stable Focus System (USFS), named appropriately for the precision linear ball bearing at the heart of the system. During focusing, USFS minimises unwanted lateral motion of the primary mirror (focus shift). When the telescope is pointed at different positions in the sky, the USFS bearing limits movement of the primary mirror (mirror flop). The RASA 11 V2 is also compatible with the Celestron Focus Motor for electronic focusing (no retrofit kit needed).

    The RASA 11 V2 also features a 12V DC MagLev fan to provide optimal airflow and reduce cooldown time. The OTA is dust-filtered with vents and mesh filters to prevent dust ingress.

    Every component of the 11 Rowe-Ackermann V2 is hand-picked by Celestron for optimal performance with both DSLRs and astronomical CCD cameras. From the thickness of the glass or the Dovetail CGE bars on the OTA, the RASA 11 V2 is the epitome of optical excellence.


    Optics Central is an Authorised Retailer of Celestron. The Celestron RASA 11 V2 Rowe-Ackermann Schmidt Astrograph Telescope (OTA Only) is backed by the Celestron 2 Year Warranty.


    Full Specifications

    Optical Tube Assembly (OTA)
    Optical Design Rowe-Ackermann Schmidt Astrograph (RASA)
    Aperture 279mm (11-inches)
    Focal Length 620mm (24.4-inches)
    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 - 700nm
    Spot Size < 4.4 μm RMS across FOV
    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 Construction Aluminium
    Optical Coatings StarBright XLT
    Optical Tube Length 838.2mm (33")
    Optical Tube Diameter 330.2mm (13")
    Optical Tube Weight 19.5kg
    Focuser Ultra-Stable Focus System (USFS)
    Ventilation Fan Yes
    Dual Dovetail Mounting Bars Yes
    Dovetail CGE Dovetail Bar
    Warranty Celestron 2-Year Warranty


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    About Celestron

    Imagine a humble beginning – a 6-inch reflector telescope crafted by Tom Johnson for his young son. This was the spark that ignited a transformative journey. As time passed, his designs evolved into larger, more sophisticated scopes. Today, Celestron shines as an industry trailblazer, renowned for crafting precision optical equipment. From computerised marvels to traditional telescopes, binoculars, spotting scopes and more, Celestron's portfolio is a universe of possibilities. With a legacy spanning over 50 illustrious years, Celestron has earned admiration from both avid hobbyists and dedicated astronomers worldwide. But they don't rest on their laurels; innovation propels them forward. They constantly broaden their product horizons while illuminating minds through global science education initiatives. Celestron's story is one of innovation, evolution and a passion for the cosmos. Join them on this extraordinary journey of discovery and inspiration.

    Product Code: 91076

    More Information
    Optical DesignRowe-Ackermann Schmidt Astrograph (RASA)
    Aperture11-inches (279mm)
    Focal Length620mm (24.4-inches)
    Focal Ratiof/2.2
    Dovetail TypeCelestron CGE Mount
    Tube Length838.2mm (33")
    Electronic Hand ControlNo
    Motor DriveNo
    Warranty InformationCelestron 2 Year Warranty
    Additional Specifications of ProductUltra-Stable Focus System (USFS)
    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 Window: 68mm (2.67") Ø
    Ventilation Fan
    CGE Dovetail Bar
    Dual Dovetail Mounting Bars
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    1 x 42mm (1.65") T-Thread Camera Adapter

    1 x 48mm (1.89") Camera Adapter

    1 x Dust Cover

    1 x Fan Battery Pack

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