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Two-lens apochromatic refractor with extra-low dispersion optics. Aperture: 66mm. Focal length: 400mm

Optical design
Aperture – the diameter of the light-collecting lens (refractors and catadioptric) or mirror (reflectors) that the telescope uses to collect light
Focal length – the distance from the primary lens or mirror to the point at which the light is focused

Product ID 61945
Brand Levenhuk, Inc., USA
Warranty lifetime
EAN 5905555002576
Package size (LxWxH) 15.7x11.4x8.3 in
Shipping Weight 9.6 lb

The Levenhuk Ra R66 ED Doublet Black OTA apochromatic refractor is a short-focus optical tube that allows for getting an idea of the objects from the Messier and NGC catalogues as well as observe the relief of the lunar surface in detail. You can carry out planetary observations as well as deep sky observations. However, the primary use of this Optical Tube Assembly (OTA) is astrophotography. The pictures taken by this telescope are high contrast and very clear detail.

The lenses are made of extra-low dispersion glass that effectively suppresses chromatic aberrations, especially secondary and spherochromatism. The wide field of view makes it comfortable to study extended areas of the sky. The telescope features a dual-speed Crayford focuser that provides smooth and highly accurate focusing under all conditions.

The optical tube is made of anodized aluminum and can be installed on most modern mounts. As the OTA is quite lightweight and compact, it is a great choice for countryside trips. The kit also includes a convenient aluminum case for transporting and storing the telescope.

Please note: Mount, tripod, and optical accessories are not included.


  • Compact and lightweight apochromatic refractor
  • Fully multi-coated glass lenses made of ED glass
  • Dual-speed Crayford focuser for precise focus adjustments
  • Excellent image clarity and contrast, minimal chromatism
  • Excellent choice for astrophotography, good for visual observations

The kit includes:

  • Telescope optical tube
  • Cleaning wipe
  • Aluminum case
  • Protective caps
  • User manual and lifetime warranty
Product ID 61945
Brand Levenhuk, Inc., USA
Warranty lifetime
EAN 5905555002576
Package size (LxWxH) 15.7x11.4x8.3 in
Shipping Weight 9.6 lb
Optical design refractor
Optical scheme apochromat
Optics material ED
Optics coating fully multi-coated
Objective lens diameter (aperture), in 2.6
Focal length, in 15.7
Highest practical power, x 132
Aperture ratio f/6
Resolution threshold, arcseconds 1.75
Limiting stellar magnitude 11.2
Focuser 1.25", Crayford, dual-speed
Telescope control manual
Optical tube mounting mode quick-release 1/4" thumbscrew
Optical tube material anodized aluminum
User level experienced users, professionals
Assembly and installation difficulty level easy
Observed object planets of the Solar System
Pouch/case/bag in set case
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