Barska 20×80 WP Cosmos Astronomical Binoculars (Black)

Description

Built for deep-sky scanning, the Barska 20×80 WP Cosmos Astronomical Binoculars (Black) pulls in faint celestial objects through massive 80mm objectives. Its 20x magnification, 4mm exit pupil, and 15.4mm eye relief provide a 157-foot field of view at 1000 yards (3.0-degree actual). Handholding this 5.6-pound instrument produces severe image shake, making tripod mounting mandatory.

High-density BaK-4 Porro prisms run broadband fully multi-coated (FMC) layers to maximize photon transmission against dark night skies. The cast-aluminum chassis is protected by black rubber armoring, weighing 5.6 lbs (2.5 kg). Nitrogen filled and sealed against moisture, it features individual eyepiece helical focusers working down to 39.4 feet (12 m), fold-down rubber eyecups, and an integrated structural tripod mounting bar with a threaded balance adapter.

Key Features of Barska 20×80 WP Cosmos Astronomical Binoculars (Black)

Engineered for stationary deep-sky observation and extreme long-range coastal surveillance. The dual 80mm objective lenses pull in faint nebulae, lunar craters, and star clusters that remain invisible in standard handheld binoculars.

• High-power 20x magnification paired with 80mm light-gathering apertures
• High-density BaK-4 Porro prisms for high transmission and depth
• Broadband fully multi-coated (FMC) optics minimizing internal stray reflections
• 157 ft field of view at 1000 yd (3.0-degree actual angle)
• 15.4mm eye relief with soft fold-down rubber eyecups
• Individual eyepiece focus system eliminating center-bridge flex
• Nitrogen gas purged aluminum housing with protective rubber armor
• Heavy 5.6 lb stationary chassis with built-in sliding tripod adapter

80mm Aperture Physics & Dark Sky Contrast

The oversized 80mm objective lenses gather extensive light, resolving the lunar terminator and deep-sky targets with high contrast. The Porro prism path eliminates phase shifts naturally, though high magnification exaggerates minor atmospheric shimmer and reveals slight edge astigmatism near the field stops.

Stationary Mass & Tripod Bar Balance

Weighing 5.6 pounds, this large optical platform creates heavy torque that requires a rigid tripod head. The sliding balance clamp along the central structural bar allows you to adjust the center of gravity, preventing your mount from tipping when aimed toward the zenith.

• Independent helical ocular focusers lock critical focus without bridge play
• Nitrogen purging prevents internal moisture condensation during cold night observation shifts
• Sliding tripod adapter post ensures stable equilibrium on heavy-duty photo and video heads

Barska Limited Lifetime Warranty & Case

Barska covers this heavy-duty binocular with their Limited Lifetime Warranty against structural flaws and manufacturing defects under normal use. The complete factory package contains the Barska 20×80 WP Cosmos Astronomical Binoculars (Black), heavy-duty hard transport case, objective lens covers, ocular protective caps, neck strap, and a lens cleaning cloth.