Used Celestron 11" RASA V1 OTA
Used Celestron 11" RASA V1 OTA
Used Celestron 11" RASA V1 OTA

Celestron

Used Celestron 11" RASA V1 OTA

SKU: U2502-RC-91076


  • Sale
  • $2,199.95
  • $4,399.00
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Not Returnable Please note that used items are not returnable.

This is an 11" RASA OTA from an estate.  It is in very good condition, with some minimal dust specks on the corrector plate; see the photos.  This is the Version 1 OTA, with the Feathertouch focuser. 

It includes both sizes (M42 and M48) of camera adapters and the retaining ring shown in the photos, along with the battery pack for the cooling fan.  This is a STEAL at HALF-OFF and won't last!  

We do not have the shipping boxes for this, so this is for in-store pickup only. 

   

  

  

  • Fast, wide-field 11” f/2.2 optical design with rare-earth glass for images free of false color, coma, and field curvature
  • Large 43.3mm optimized image circle maintains pinpoint stars to the far corners of even the largest astroimaging sensors, while the usable field extends even further to 52mm for larger format sensors
  • Integrated air-cooling system features a quiet, high-output 12V MagLev fan and vents with mesh filters to prevent dust ingress
  • Common camera adapters (T-thread and M48) included for easy attachment to popular CCD and DSLR cameras



    Capturing impressive deep-sky astroimages is easier than ever with Celestron’s Rowe-Ackermann Schmidt Astrograph (RASA), the perfect companion to today’s top DSLR or astronomical CCD cameras. This fast, wide-field f/2.2 system allows for shorter exposure times compared to traditional f/10 astroimaging, without sacrificing resolution. Because shorter sub-exposure times are possible, your equatorial mount won’t need to accurately track over extended periods. The short focal length also lessens equatorial tracking demands. In many cases, autoguiding will not be required.

    RASA 11 builds on the legacy of Celestron’s Schmidt Cameras, which allowed astrophotographers to produce images with much shorter exposure times on film in the 1970s.

    Today, with CCD sensor sizes as large as film or larger, the RASA 11 offers a 43.3mm optimized image circle to capture pinpoint stars on the largest imaging chips. Optical performance for huge sensors with diagonals of up to 52mm wide is still excellent.

    Combine this large image circle with a focal length of just 620mm and you have an instrument suitable for wide-field imaging, creating huge mosaics of the night sky, surveying, and even comet hunting.

    Optical Performance
    The RASA 11 features optics with 4-element rare-earth glass for images free of false color and aberrations like coma and field curvature. The optical quality and spot size across the entire image circle are unprecedented for an astrograph in this price range—or even that of a much more expensive instrument. The design also provides minimal vignetting.

    Advanced Features
    The integrated 12V DC MagLev fan reduces cooldown time and provides optimal airflow through the dust filtered optical tube.

    Engineered as a complete astroimaging system, every component of the RASA 11 is optimized for peak performance with DSLR and astronomical CCD cameras. Down to the thickness of the glass used in the included fully-multicoated optical window or optional imaging filter, every component of the system has been taken into careful consideration to work together seamlessly. The Dovetail CGE bars on the top of the optical tube provides a connection for use of optional accessories like a guidescope.

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