SkyWatcher Black Diamond ED80 Doublet Refractor OTA

product overview
product overview
  • 80mm Apochromatic Refractor

  • 600mm Focal Length, f/7.5 Focal Ratio

  • Proprietary MHC Multicoated Optics

  • Schott BK-7 and FPL-53 ED Glass

  • 2" Crayford Focuser with 1.25" Adapter

  • 20mm and 5mm Eyepieces, 90° Diagonal

  • 8x50 RA Erect-Image Finderscope

  • Vixen-Style Dovetail Plate & Cradle-Ring

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The Black Diamond ED80 Doublet Refractor OTA from Sky-Watcher features a doublet apochromatic lens system with Extra-low Dispersion (ED) glass and Sky-Watcher's proprietary photon anti-rejection Metallic High-Transmission Coatings (MHC) on all air-to-glass optical surfaces. This combination of glass, lenses, and coatings virtually eliminates chromatic aberrations for clear and bright high-contrast images with true color rendition. This is a versatile optical tube assembly (OTA) that is well suited for wide-field astronomical observation of prominent nebulae, star clusters and galaxies, or can be used as an astrograph for sky photography, a terrestrial spotting scope or telephoto lens.

A mounting cradle-ring clamps over OTA and allows the user to adjust the orientation and position of the scope relative to the mount to optimize viewing comfort and balance, while avoiding interference with other equipment. The scope is offered without a mount or tripod, but a Vixen-style dovetail plate makes it compatible with any alt-az or equatorial mount with a Vixen-style saddle.

Its two-speed Crayford-style focuser helps make fine-focusing fast and precise without backlash. The ProED comes with several accessories to help you get observing faster and easier. First, are two long eye relief eyepieces that produce 30 and 120x magnification, a 90° star diagonal for more comfortable viewing, and a large 8x50 erect-image finderscope to make finding your celestial objects faster and easier. Finally, Sky-Watcher provides a foam-lined aluminum carrying case to safely store and transport the OTA.

Optical Performance
  • 80mm objective lens
  • 600mm focal length
  • Focal ratio: f/7.5
  • Refractor-style optical design
  • Extra-low Dispersion (ED) glass
  • Apochromatic doublet lenses eliminate chromatic aberrations for true color rendition and enhanced contrast
  • Proprietary anti-reflection Metallic High-Transmission Coatings (MHC) multicoatings on all optics
  • Bbjective lens cell is light-baffled to reject stray, unfocused light
  • Baffled draw tube for enhanced contrast
  • OTA interior is flat blackened to help prevent unfocused internal light reflections from reaching the focal plane
  • Resolution, Rayleigh: 1.74 arc sec
  • Resolution, Dawes: 1.45 arc sec
  • 2" diameter focuser
  • Dual-speed Crayford-style
  • Crayford focusers use a toothless friction system that allows for super-fine precision focusing without backlash
  • Includes 1.25" adapter for using smaller eyepieces and accessories
Included Accessories
  • Diagonal:
    • 90° angle
    • Dielectric coatings for greater than 99% reflectivity
    • Star diagonal corrects images vertically, but not horizontally
  • 8x50 erect-image finder scope with bracket
  • User-supplied mount and tripod required
  • Vixen-style dovetail plate included
  • Compatible with any alt-az or equatorial mount with a Vixen-style saddle
  • Cradle-ring assembly for plate allows the scope orientation to be changed based on mount configuration
  • Integrated 1/4"-20 piggy-back camera mount for wide-field astro photography
  • Quick-release system for fast setup and breakdown


  • GTIN - N/A
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D/A conversionED Refractor
Focal Length600mm
Focal RatioF/7.5
Highest Practical Power160x
Faintest Steller Magnitude12.2
Resolving Power1.45
Focus Diameter2
Finderscope8X50 with Bracket
Diagonal Angle of View2\" 90 Dielectric Diagonal
Piggyback BracketYes
Dimensions10 cm x 62cm
UsageViewing the Planets
User LevelFor Intermediates
Mount TypeNone
Finderscope8X50 with Bracket
Diagonal5cm 90 Dielectric Diagonal
Piggyback BracketYes
Tube Weight2.47kg
Tube Dimension10 cm x 62cm
User LevelFor Intermediate
Telescope TypeApochromatic-Refractor
Aperture Size80mm
Focal Ratiof/7.5
EyepiecesLET 28mm
Focuser Diameter5cm
Resolving Power1.45
Faintest Steller Magnitude12.2
Shipping Dimensions67.5 x 33 x 23 cm
Optical DesignED Refractor
Lens MaterialFPL-53
Focal Length600mm
Highest Practical Power160x
Video LinkNo
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What’s In The Box

SkyWatcher Black Diamond ED80 Doublet Refractor OTA

  • Sky-Watcher ProED 80mm f/7.5 Doublet APO Refractor (OTA only)

  • 2" 90&Deg; Diagonal

  • 1.25" Eyepiece Adapter

  • 8x50 Finderscope with Bracket

  • Mounting Plate and Cradle Ring Assembly

  • Warranty

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