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Levenhuk Ra 150C Cassegrain OTA

Levenhuk
Reflector with a paraboloid primary mirror and a hyperboloid secondary mirror. Aperture: 153mm. Focal length: 1836mm
  • Category: Telescope
  • Product ID: 77654
  • Country: PRC, controlled by Levenhuk, Inc. (USA)
  • Shipping weight: 18 lb (8.16 kg)
  • Package size (LxWxH): 26.0×13.0×11.8 in (66×33×30 cm)
  • Out of stock
  Levenhuk Ra 150C Cassegrain OTA is a Cassegrain reflector that is perfect for observing deep sky. It features a distinguished design. The primary mirror is paraboloid and the secondary mirror is hyperboloid. Due to this, the transmitted picture has no spherical distortion across the entire field of view up to the maximum magnification. This Optical... more

Levenhuk Ra 150C Cassegrain OTA is a Cassegrain reflector that is perfect for observing deep sky. It features a distinguished design. The primary mirror is paraboloid and the secondary mirror is hyperboloid. Due to this, the transmitted picture has no spherical distortion across the entire field of view up to the maximum magnification. This Optical Tube Assembly (OTA) will be appealing to demanding and experienced users.

The optics are made of quartz glass with a silicon dioxide coating. The optical system has a reflectivity index of 92~96%. The dual-speed Crayford focuser has no backlash, so that it enables precise focus adjustments. The optical tube is made of steel, inside there is a high-quality blackening, and on the outside, there are two mounts: for the holder and for mount installation (dovetail plate). Levenhuk Ra 150C Cassegrain OTA is compatible with almost all of the modern mounts.

Please note: Mount, tripod, finder, and eyepieces are not included.

Features:

  • Reflector with a paraboloid and hyperboloid mirrors
  • Silicon dioxide coating with a reflectivity index of 92~96%
  • Full absence of spherical aberration
  • Good correction of astigmatism and field curvature
  • Dual-speed Crayford focuser, precise and fast adjustment of sharpness
  • 8 internal knife-edge baffles
  • Drawtube travel: 41mm (laser-engraved millimeter scale)
  • Backfocus distance: 157.2mm (from end of 2” focuser collar)

The kit includes:

  • Telescope optical tube
  • Finder scope base
  • Dovetail plate
  • 2” Extension ring
  • 1” Extension ring
  • Dust cover
  • User manual and lifetime warranty

Optical design

reflector

Optics material

quartz

Optics coating

silicon dioxide

Primary mirror diameter (aperture), mm

153

Secondary mirror diameter, mm

50

Lens (mirror) shape

primary: paraboloid; secondary: hyperboloid

Focal length, mm

1836

Highest practical power, x

304

Focal ratio

f/12

Resolution threshold, arcseconds

0.76

Limiting stellar magnitude

13.6

Eyepiece barrel diameter

1.25/2

Focuser

2'' dual-speed Crayford

Operating temperature range, °C
°F

−5… +35

Tube-mount assembly system

dovetail plate

Optical tube material

steel

User level

expert

Assembly and setup

simple

Observed objects

deep-sky objects
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