Celestron RASA 8 Rowe-Ackermann Schmidt Astrograph OTA | PixelSkiesAstro
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  • Celestron RASA 8 Rowe-Ackermann Schmidt Astrograph OTA | PixelSkiesAstro
  • Celestron RASA 8 Rowe-Ackermann Schmidt Astrograph OTA | PixelSkiesAstro
  • Celestron RASA 8 Rowe-Ackermann Schmidt Astrograph OTA | PixelSkiesAstro
  • Celestron RASA 8 Rowe-Ackermann Schmidt Astrograph OTA | PixelSkiesAstro
  • Celestron RASA 8 Rowe-Ackermann Schmidt Astrograph OTA | PixelSkiesAstro
  • Celestron RASA 8 Rowe-Ackermann Schmidt Astrograph OTA | PixelSkiesAstro
  • Celestron RASA 8 Rowe-Ackermann Schmidt Astrograph OTA | PixelSkiesAstro
  • Celestron RASA 8 Rowe-Ackermann Schmidt Astrograph OTA | PixelSkiesAstro
  • Celestron RASA 8 Rowe-Ackermann Schmidt Astrograph OTA | PixelSkiesAstro
  • Celestron RASA 8 Rowe-Ackermann Schmidt Astrograph OTA | PixelSkiesAstro

Celestron RASA 8 Rowe-Ackermann Schmidt Astrograph OTA

2 449,00 €
TTC

8" Rowe-Ackermann Schmidt Astrograph, 400 mm f/2.0, 22 mm Ø (3.15°) image circle, CGE dovetail.

Manufacturer model: Celestron 91073 · Specifications checked against manufacturer data on 2026-11-06

Celestron RASA 8 Rowe-Ackermann Schmidt Astrograph OTA

8" Rowe-Ackermann Schmidt Astrograph, 400 mm f/2.0, 22 mm Ø (3.15°) 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)
Aperture203 mm (8")
Focal length400 mm
Focal ratiof/2.0
Image circle22 mm Ø (3.15°)
Usable field32 mm Ø (4.6°), minimal loss at the edge
Wavelength range400–800 nm
Spot size< 2.3 µm RMS across image circle
Off-axis illumination93% at 11 mm off-axis
CoatingsStarBright XLT
Central obstruction93 mm (46% of aperture)
Optical window46 mm Ø
CoolingIntegrated 12 V DC fan

Mechanical and package

Back focus with included camera adapter25 mm with included adapter; 29 mm from top of threaded collar
FocuserPrecision Bearing System (PBS)
Tube length628 mm
Tube diameter235 mm
Weight7.7 kg
DovetailCGE dovetail bar
FinderscopeNot included
Included42 mm (M42) T-thread camera adapter; C-thread camera adapter; fan battery pack

Manufacturer documentation

Specifications from Celestron's official product page (model 91073), checked 2026-11-06. Supplier: Nimax item 60246.

60246

Fiche technique

Diamètre (mm)
203
Traitements
StarBright XLT
Queue d'aronde
CGE
Focale (mm)
400
Rapport F/D
f/2.0
Cercle image (mm)
22
Formule optique
Rowe-Ackermann Schmidt Astrograph (RASA)
Diamètre du tube (mm)
235
Longueur du tube (mm)
628
Poids (kg)
7.7

Références spécifiques

UPC
050234910736
EAN13
4047825040343
MPN
91073
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