8” Rowe-Ackermann Schmidt Astrograph

192,905.00 excl. 18% GST

  • Flat field free of optical aberrations like field curvature, coma, astigmatism and chromatic aberration across an entire APS-C sensor.
  • Unlike the larger RASAs that work with DSLR and large CCD cameras, the 8” model was designed with color astronomical CMOS cameras, smaller CCD cameras, and mirrorless cameras in mind. The telescope does not work with standard DSLR cameras.
  • NEW Ultra-Stable Focus System – precision linear ball bearing virtually eliminates image shift.
  • Integrated air cooling system –12V DC MagLev fan reduces cooldown time and provides optimal air flow while filtering out dust.
  • Internal filter mount – seamlessly accommodates a Light Pollution Imaging Filter into the optical path.
  • CGE dovetail mounting rail.
  • Performs over a wider spectral range than most telescopes, from 390-800 nm, so more of the light passing through the Astrograph is in sharp focus.

Available on backorder

OPTICAL TUBE INFO:
Optical Design Rowe-Ackermann Schmidt Astrograph
Aperture 203mm (8″)
Focal Length 400mm (15.74″)
Focal Ratio f/2.0
Central obstruction diameter 93mm (3.66″) (46% of aperture diameter)
Light Gathering Power (Compared to human eye) 843x
Resolution (Rayleigh) 0.68 arc seconds
Resolution (Dawes) 0.57 arc seconds
Image Circle 22mm (.86″) Ø, 3.15°
Useable field 32mm (1.26″) Ø, 4.6°, only minimal performance loss at edge of FOV
Wavelength range 390 – 800 nm
Spot size < 4.6 μm RMS across image circle
Optical Coatings StarBright XLT
Off-axis Illumination 93% at 11mm (.43″) off-axis
Optical Window 46mm (1.81″) Ø
Back focus with included camera adapter 25mm (.98″)
Back focus from top of threaded collar 29mm (1.14″)
Optical Tube Aluminum
Optical Tube Length 628mm (24.7″) length | 235mm (9.3″) diameter
Focuser Ultra-Stable Focusing System
Finderscope Not included
Optical Tube Weight 17 lbs (7.7 kg)
Other Features Air-cooling system, integrated filter mount
Included items M42 camera adapter, C-thread camera adapter, fan battery pack
Dovetail CGE Dovetail Bar

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