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Celestron 11 inch Rowe-Ackermann Schmidt Astrograph V2 optical tube assembly, white finish

Celestron

Celestron 11" RASA V2 OTA Only

SKU CH-2XBJ-9Y4BE

A fast f/2.2 Rowe-Ackermann Schmidt Astrograph with a 43.3 mm image circle and 620 mm focal length for wide-field deep-sky imaging

  • Ultra-fast f/2.2 focal ratio cuts exposure time
  • 3 mm image circle covers large sensors edge-to-edge
  • 620 mm focal length eases equatorial tracking demands
  • StarBright XLT coatings maximise light transmission for brighter images
  • Wide-field Schmidt astrograph design minimises aberrations for deep-sky detail

Telescope for deep-sky imaging

The Celestron 11" Rowe-Ackermann Schmidt Astrograph Version 2 is an optical tube assembly built for wide-field astrophotography. Its f/2.2 focal ratio and 620mm focal length suit DSLR or astronomical CCD cameras that need fast light gathering across a large sensor.

Behaviour during long sessions

The fast f/2.2 system shortens exposure times so the equatorial mount does not need to track accurately over extended periods. In many cases autoguiding becomes unnecessary, reducing the mechanical load on the mount during multi-hour imaging runs.

Checks before ordering

Verify your camera sensor diagonal does not exceed 52mm to benefit from the 43.3mm optimized image circle. Ensure the focuser and mounting hardware match your existing focuser drawtube and dovetail specifications. Confirm your equatorial mount can carry the optical tube weight and balance it at this short focal length.

Highlights

  • Ultra-fast f/2.2 focal ratio cuts exposure time
  • 3 mm image circle covers large sensors edge-to-edge
  • 620 mm focal length eases equatorial tracking demands
  • StarBright XLT coatings maximise light transmission for brighter images
  • Wide-field Schmidt astrograph design minimises aberrations for deep-sky detail

Specifications

No published specifications for this item yet.

Questions about this item

How much heat or power does the 11" RASA V2 generate during long imaging sessions?

The optical tube is a passive system with no internal power draw or active cooling, so it adds no heat or electrical load during all-night runs.

What camera and mount must I already own to use this f/2.2 astrograph?

You need a DSLR or astronomical CCD camera with a sensor diagonal up to 52 mm and a sturdy equatorial mount that can carry the 11-inch optical tube.

Will the 620 mm focal length and 43.3 mm image circle work with my older DSLR that has a smaller sensor?

Yes, the large image circle covers smaller sensors completely, delivering edge-to-edge sharpness across the full frame of older cameras.

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