Celestron RASA 11 V2 Rowe-Ackermann Schmidt Astrograph OTA | PixelSkiesAstro
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  • Celestron RASA 11 V2 Rowe-Ackermann Schmidt Astrograph OTA | PixelSkiesAstro
  • Celestron RASA 11 V2 Rowe-Ackermann Schmidt Astrograph OTA | PixelSkiesAstro
  • Celestron RASA 11 V2 Rowe-Ackermann Schmidt Astrograph OTA | PixelSkiesAstro
  • Celestron RASA 11 V2 Rowe-Ackermann Schmidt Astrograph OTA | PixelSkiesAstro
  • Celestron RASA 11 V2 Rowe-Ackermann Schmidt Astrograph OTA | PixelSkiesAstro
  • Celestron RASA 11 V2 Rowe-Ackermann Schmidt Astrograph OTA | PixelSkiesAstro
  • Celestron RASA 11 V2 Rowe-Ackermann Schmidt Astrograph OTA | PixelSkiesAstro
  • Celestron RASA 11 V2 Rowe-Ackermann Schmidt Astrograph OTA | PixelSkiesAstro
  • Celestron RASA 11 V2 Rowe-Ackermann Schmidt Astrograph OTA | PixelSkiesAstro
  • Celestron RASA 11 V2 Rowe-Ackermann Schmidt Astrograph OTA | PixelSkiesAstro

Celestron RASA 11 V2 Rowe-Ackermann Schmidt Astrograph OTA

€4,149.00
Tax included

11" Rowe-Ackermann Schmidt Astrograph, 620 mm f/2.2, 43.3 mm Ø (4.0°) image circle, CGE dovetail.

Manufacturer model: Celestron 91076 · Specifications checked against manufacturer data on 2026-11-06

Celestron RASA 11 V2 Rowe-Ackermann Schmidt Astrograph OTA

11" Rowe-Ackermann Schmidt Astrograph, 620 mm f/2.2, 43.3 mm Ø (4.0°) image circle, CGE dovetail.

The Rowe-Ackermann Schmidt Astrograph (RASA) is a dedicated imaging telescope: the camera sits at the front of the tube, at prime focus, giving an extremely fast focal ratio and a flat, colour-corrected field. Exposures are a fraction of those needed at f/7–f/10, and short exposures often make autoguiding unnecessary. Imaging only, not for visual use. Check that your camera's body is small enough for the front-mounted position (dedicated astro CMOS cameras are ideal; most DSLRs are not suitable).

Optical

Optical designRowe-Ackermann Schmidt Astrograph (RASA)
Aperture279 mm (11")
Focal length620 mm
Focal ratiof/2.2
Image circle43.3 mm Ø (4.0°)
Usable field52 mm Ø (4.8°), minimal loss at the edge
Wavelength range400–700 nm
Spot size< 4.4 µm RMS across field
Off-axis illumination83% at 21 mm off-axis
CoatingsStarBright XLT
Central obstruction114 mm (41% of aperture)
Optical window68 mm Ø
CoolingVentilation fan; dual dovetail bars

Mechanical and package

Back focus with included camera adapter55 mm with included adapter; 72.8 mm from top of threaded collar
FocuserUltra-Stable Focus System
Tube length838.2 mm
Tube diameter330.2 mm
Weight19.5 kg
DovetailCGE dovetail bar
FinderscopeNot included
Included42 mm (M42) T-thread camera adapter; 48 mm camera adapter; dust cover; fan battery pack

Manufacturer documentation

66036

Data sheet

Aperture (mm)
279
Coatings
StarBright XLT
Dovetail
CGE
Focal length (mm)
620
Focal ratio
f/2.2
Image circle (mm)
43.3
Optical design
Rowe-Ackermann Schmidt Astrograph (RASA)
Tube diameter (mm)
330.2
Tube length (mm)
838.2
Weight (kg)
19.5

Specific References

UPC
050234910767
EAN13
4047825044433
MPN
91076
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