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Sky-Watcher

Sky-Watcher Pro SW 80ED APO 80mm ED Refractor Optical Tube Assembly with ED Refractor Design, 600mm Focal Length

SKU: SKWS11100 MFR: S11100
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About the Sky-Watcher 80ED Refractor

The Sky-Watcher Pro SW 80ED APO 80mm ED Refractor Telescope produces the sharpest, highest quality imaging obtainable from any telescope optical design due to the unobstructed textbook-like diffraction patterns and exotic optical properties. The Sky-Watcher ED-APO 80mm is a modestly wide-field telescope offering bright, wide swaths of sky in a single view. It is well suited for wide-field astronomical observation of prominent nebulae, star clusters and galaxies from a dark-sky location, or can be used as an astrograph for sky photography.

As a terrestrial spotting scope or telephoto lens, the ED-APO's performance is absolutely superb. Ultra high contrast allows the subtlest of details to be easily scrutinized under conditions of good seeing. The petite silhouette of the SW ED-APO 80mm makes for an excellent compact, portable telescope that travels light and fits a small space. At about 50-power structural detail becomes apparent in the solar system's gas giants like Saturn and Jupiter. The Moon also exhibits striking crater detail along the lunar terminator.

As an astrograph, the SW PRO 80ED delivers superb performance imaging a wide spectrum of astronomical phenomenon. In a given aperture size, refractors will always exhibit sharper images than other optical designs because the refractor concentrates more light into the central airy-disk and first diffraction rings. There is no diffraction pattern interference caused by a diagonal mirror, or secondary mirror being suspended in the optical path (central obstruction) as is the case with reflectors.

Sky-Watcher ED-APO refractor provides the finest images obtainable-bar none-in their design class. Sky-Watcher ED apochromatic refractor delivers dramatic coal-back skies and faithful, contrast-rich views of planetary and deep-space phenomenon that are second to none. Sky-Watcher ED-APO refractor is the logical choice as an investment in advanced instrumentation for exceptional viewing or photography.

The Sky-Watcher ED-APO design assures virtual elimination of secondary, residual "false color" normally present in 2-element achromatic lens designs using Crown and Flint glass. Sky-Watcher APO refractors utilize a second lens element made from the mineral fluorite instead of Flint glass. Fluorite, CaF2, is a halide with unique properties and a hardness of only four. It is an exotic and difficult material to fabricate into a lens.

Sky-Watcher 80ED Refractor Includes

  • Sky-Watcher Pro SW 80ED APO 80mm ED Refractor Telescope
  • RA 8x50mm Viewfinder with Bracket
  • 2" Dielectric Diagonal
  • Two 1.25" LE (Long Eye Relief) Eyepieces (LE20mm and LE5mm)
  • 1.25" Focuser Adaptor
  • Tube Ring Attachment Hardware for Mounting to Sky-Watcher EQ5PRO Mount (or Other Compatible Mount)
  • Foam Lined Aluminum Carry/Storage Case
  • Sky-Watcher Warranty

Sky-Watcher 80ED Refractor Features

  • Virtually Eliminates Residual Chromatic Aberration
  • Pride and Perfection in Optical Manufacturing
  • Metallic High-Transmission Lens Coatings: Each air-to-glass lens surface has exotic anti-reflection metallic coatings applied to ensure optimum light through-put. The proprietary Sky-Watcher "Metallic High-Transmission Coatings" (MHC) are the finest photon anti-rejection coatings in their class
  • Light-Baffled Optical Systems: The objective lens cell is light-baffled to reject stray, unfocused light. The draw tube is likewise baffled to insure optimum contrast. The tube interior is flat blackened to help prevent unfocused internal light reflections from reaching the focal plane
  • Precision 2" Crayford-style Focuser is Standard: Optical focus is achieved by means of a mechanically ultra-smooth, backlash-free, precision 2" Crayford-style rack & pinion focuser-assembly with 1.25" adaptor. Focuser offers 2 speeds for fine and ultra-fine focusing adjustments
  • Tube Materials: The optical tube material is aluminum, powder-coated reflective gloss black with gold fleck accent. The front and back cells are cast-aluminum painted white, or black
  • Telescope Tube Attachment Hardware: The Sky-Watcher APO optical tube comes with attachment hardware that allows them to be securely fastened to the SW EQ5P mount

Sky-Watcher 80ED Refractor Specifications

Optical Design ED Refractor
Lens Material FPL-53
Aperture (Diameter) 80 mm (3.15 in)
Focal Length 600 mm (24 in)
Focal Ratio f/7.5
Highest Useful Magnification 189x
Lowest Useful Magnification 11 x
Limiting Stellar Magnitude 12
Resolution (Rayleigh) 1.74 arc seconds
Resolution (Dawes) 1.45 arc seconds
Light Gathering Power 131x (Compared to human eye)
Finderscope 8x50 RA Viewfinder
Focuser Diameter 2"
Optical Tube Length 23.8in (605 mm)
Optical Tube Weight 12.6 lbs (5.72 kg)
Warranty Sky-Watcher warranty
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