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91077 CELESTRON 36CM (14") ROWE-ACKERMAN SCHMIDT ASTROGRAPH OTA

$19,100.00
SKU:
91077
Weight:
75.0000 LBS
Shipping:
Calculated at checkout
Quantity:

Product Description

36 CM ROWE-ACKERMANN SCHMIDT ASTROGRAPH

  • A breakthrough 36 cm aperture, f/2.2 optical system designed for professional applications that require both a wide field of view and resolution, such as space surveillance and other scientific applications
  • 4-element lens group utilizes extra-low dispersion (ED) glass for images free of false color, coma, and field curvature, the Rowe-Ackermann Schmidt Astrograph (RASA) 36 cm is also an excellent choice for advanced astroimaging
  • 60 mm optimized image circle maintains pinpoint stars to the far corners of the largest available sensors
  • Extended spectral range takes advantage of sensor response in the 700-900 nm range, allowing a brighter overall signal to be detected
  • Redesigned focusing system minimizes focus shifting or other unwanted motion of the primary mirror, enabling easy and stable focus

INCLUDES THESE CELESTRON TECHNOLOGIES

The Rowe-Ackermann Schmidt Astrograph (RASA), is a cost-effective optical system for space surveillance, Space Situational Awareness (SSA), other scientific applications, and advanced wide field astroimaging. It offers unprecedented value in aperture, speed, field of view, and optical performance. The RASA design has a convenient external prime-focus image capture location with a flat focal plane, providing small spot sizes to the edge of a wide field. The result is images free of optical defects like field curvature, off-axis coma, and astigmatism.

The 36 cm aperture version is the largest RASA Celestron manufactures; it is the biggest and fastest (f/2.2) optical instrument of its kind available “off-the-shelf.” Unlike most telescopes, which only focus visible light (400-700 nm), the RASA 36 cm focuses an extended spectral range (400-900 nm), allowing a brighter signal to be detected by a camera sensor. The RASA 36 cm also features a redesigned focus system, which ensures easy and stable focusing.

RASA 36 cm’s ample back-focus distance (77.5 mm) accommodates a wide variety of imaging sensors. A custom camera adapter can be added for a field of view up to 4.4 degrees.

OPTICAL TUBE INFO: 
Optical Design Rowe-Ackermann Schmidt Astrograph
Aperture 355.6 mm (14")
Focal Length 790 mm (31.1")
Focal Ratio f/2.2
Central obstruction diameter 158 mm (6.22")(44% of aperture diameter)
Light Gathering Power (Compared to human eye) 2581X
Resolution (Rayleigh) 0.39 arc seconds
Resolution (Dawes) 0.36 arc seconds
Image circle 60.1 mm (2.36") Ø, 4.4°
Useable field 70 mm (2.75") Ø, 5.1°, only minimal performance loss at edge of FOV
Wavelength range 400 – 900 nm
Spot size < 6.3 μm RMS across FOV
Optical coatings Enhanced aluminum, XLT multi-coatings used throughout
Off-axis Illumination 83% at 30 mm (1.18") off-axis
Optical window 104 mm (4.09") Ø
Back focus with included camera adapter 55 mm (2.16")
Back focus from top of threaded collar 77.5 mm (3.05")
Optical Tube Aluminum
Optical Tube Length 1079.5 mm (42.5")
Optical Tube Diameter 106.4 mm (16")
Focuser New focuser design, minimizes focus shift
Finderscope Not included
Optical Tube Weight 75 lbs (34.02 kg)
Other features Ventilation fan, dual dovetail mounting bars
Included items 48 mm (1.89") camera adapter, fan battery pack

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