Sky-Watcher EvoStar 80ED / ProED 80mm Doublet APO Refractor Telescope Tube

Description

Sky-Watcher EvoStar 80ED / ProED 80mm Doublet APO Refractor Telescope Optical Tube
SKU: SKWS11100
Mfr. Part: S11100
Item Includes
EvoStar 80ED / ProED 80mm Doublet APO Refractor Telescope Optical Tube - 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
Description
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.
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
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
WHO WE ARE
Adorama is one of the nation's largest Photographic retail and mail order suppliers. For over 35 years we have been serving professionals as well as amateurs in the photographic, video, digital imaging and telescope fields. We offer the best combination of quality services, vast selection, knowledgeable staff, and competitive pricing.
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