Celestron 11 Rowe-Ackermann Schmidt Astrograph -RASA Telescope - OTA Only
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")|
|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 Length||838.2mm|
|Optical Tube Weight||19.5kg|
|Included items||42 mm (1.65") T-thread camera adapter, 48 mm (1.89") camera adapter, fan battery pack|
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