Features
PRODUCT HIGHLIGHTS
BAK4 Porro Prisms
XLT Fully Multicoated Optics
Wide Angle Viewing: 64°
1.25" Astronomical Filter Compatible
Nitrogen-Filled, Water and Fogproof
Aluminium and Polycarbonate Chassis
Centre Focusing with Diopter Adjustment
Built-In Standard 1/4"-20 Tripod Mount
Fold-Down and Winged Eyecups
Detachable Rail for FinderscopeOVERVIEW
Designed as an ideal optic for wide-view astronomical or long-range terrestrial observation, the Celestron 20x80 SkyMaster Pro Binocular features their proprietary XLT multicoating system to reduce reflection and increase light transmission through the entire optical system. The porro prism configuration provides a rich depth of view and high-contrast to draw users into an immersive observational experience. Filter threads on the eyepieces are compatible with 1.25" astronomical filters to enhance the viewing experience by adding light pollution, neutral density, or colored filters. The combination of optical coatings, prism, over-sized 80mm objectives, and the ability to use filters produce user-specific high-contrast views that are bright and crisp.
To help reduce weight, the binocular housing is made from a combination of polycarbonate polymer and aluminium. The aluminium provides strength in key areas, while the polycarbonate is temperature-resistant to limit expansion and contraction in extreme temperatures, which can cause the optical components to move out collimation and preventing the ability to achieve sharp focus. Large objectives and long optical tubes make the SkyMaster Pro fairly heavy with a center of gravity biased forward, so hand-holding it may cause fatigue and noticeable hand-shake. A center stabilizer bar has a built-in 1/4"-20 tripod adapter to mount the instrument, with a detachable rail for a red-dot finderscope. To handle a wide range of environments, the optical tubes are nitrogen-filled and O-ring sealed to be water and fogproof.
Optical Performance
20x magnification
80mm objective lenses
BAK4 porro prism optical path
Proprietary XLT fully multicoated optics increases light transmission for bright high-contrast images
168' field of view at 1000 yards
64° wide-angle viewing
Use and Handling
Eyepiece threads accept any 1.25" astronomical filters
Detachable RSR (Reflex Sight Ready) rail for attaching an optional red dot finderscope
Includes standard fold-down and winged eyecups to block stray peripheral light that can affect vision
15.5mm eye relief, 4.0mm exit pupil
Construction Details
Lightweight and durable polycarbonate and aluminium chassis
Nitrogen-filled for water and fogproof performance
Rubber armour protects against impacts and provides slip-resistant grip
Built-in tripod adapter for easy mounting
SPECIFICATIONS
Magnification 20x
Objective Lens Diameter 80 mm
Angle of View 3.2° (actual)
Field-of-View 168' @ 1000 yd / 55.78 m @ 1000 m
Minimum Focus Distance 65.62' / 20 m
Exit Pupil Diameter 4.0 mm
Eye Relief 15.5 mm
Dimensions 12.6 x 10.0 x 3.6" / 32.00 x 25.40 x 9.14 cm
Weight 93.8 oz / 2659.23 g
Included in the box
Warranty
CELESTRON Limited Lifetime Warranty