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Used - 11" Rowe-Ackermann Schmidt Astrograph (RASA 11) V2 Optical Tube Assembly (CGE Dovetail)

Used - 11" Rowe-Ackermann Schmidt Astrograph (RASA 11) V2 Optical Tube Assembly (CGE Dovetail)

Item #: U91076

Low stock Only 2 left!

$3,899.97
$4,499.00 $3,899.97
You Save: $599.03 (13%)

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30-Day Returns

2-Year Warranty

Please note: This is a gently used item. For complete product details, specs, and extras, please visit the original product page.

Gently Used, Fully Trusted
At Celestron, we believe the cosmos should be within everyone’s reach. That’s why our gently used items have been rigorously inspected and are in full working order—even if they show a few signs of past adventures. When you purchase this product, you’ll also enjoy the same comprehensive warranty as our new items, giving you confidence and peace of mind to explore the night sky.


Clear skies and happy stargazing!

Specifications

Optical Tube Info:
Optical Design: Rowe-Ackermann Schmidt Astrograph
Aperture: 279mm (11")
Focal Length: 620mm (24.4")
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 - 700 nm
Spot size: < 4.4 μm RMS across FOV
Optical Coatings: StarBright XLT
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: Aluminum
Optical Tube Length: 838.2mm (33")
Optical Tube Diameter: 330.2mm (13")
Focuser: Ultra-Stable Focus System
Finderscope: Not included
Optical Tube Weight: 43 lbs (19.5 kg)
Other Features: Ventilation fan, dual dovetail mounting bars
Included items: 42mm (1.65") T-thread camera adapter | 48mm (1.89") camera adapter | Dust cover | Fan battery pack
Dovetail: CGE Dovetail Bar
Additional Information
Solar Warning
  • Never look directly at the Sun with the naked eye or with an optic (unless you have the proper solar filter). Permanent and irreversible eye damage may result.
  • Never use your optic to project an image of the Sun onto any surface. Internal heat build-up can damage the optic and any accessories attached to it.
  • Never leave your optic unsupervised. Make sure an adult who is familiar with the correct operating procedures is with your optic at all times, especially when children are present.
California Prop 65 California Prop 65 Warning

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
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Included Celestron Technologies

  • Rowe-Ackermann Schmidt Astrograph
  • StarBright XLT Coatings

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