Steiner 7×50 Commander Binoculars

Description

Engineered for open-ocean commercial navigation and rough-water search operations, the Steiner 7×50 Commander Binoculars deliver high optical throughput and wide-angle situational awareness for ship captains, blue-water sailors, and marine patrol teams. Combining 7x magnification with large 50mm objective apertures, this Porro prism instrument yields an expansive 438-foot linear field of view at 1000 yards (145.4m at 1000m), an actual angle of view of 8.3 degrees, a large 7.1mm exit pupil, and 20.2mm of eye relief for steady orientation and rapid horizon scanning on rolling seas.

The optical system integrates high-density BaK-4 Porro prisms mounted in a shock-absorbing floating silicone suspension that absorbs up to 11 Gs of impact, paired with Steiner Diamond-Marine fully multi-coated optical elements and Nano-Protection hydrophobic lens coatings. Built inside a streamlined Makrolon polycarbonate chassis wrapped in oil-and-salt-resistant NBR Long Life rubber armoring, the housing measures 20.6 by 15.7 by 7.6cm (8.1 x 6.2 x 3 Inches) and weighs 1.1 kg (38.4 oz). The chassis is pressurized with dry nitrogen gas via 14-psi two-way valves and sealed for submersible waterproof reliability down to 10m (33 feet). Navigation and handling mechanics feature Steiner Sports-Auto Focus individual eyepiece focusing with a 66-foot (20.1m) close focus limit, ErgoFlex contoured rubber eyecups, and ClicLoc neck strap release buttons.

Key Features of Steiner 7×50 Commander Binoculars

Built to naval and maritime specifications, this 7×50 Porro prism binocular combines massive low-light light collection with a streamlined non-compass profile. The Sports-Auto Focus system delivers constant optical sharpness from 20 meters to infinity once calibrated to the operator eyes. Its nitrogen-pressurized Makrolon housing, floating prism suspension, and NBR rubber armoring provide survivability across severe maritime environments.

• 7x magnification power paired with 50mm objective lenses producing a large 7.1mm exit pupil
• Porro prism optical architecture incorporating BaK-4 glass in a shock-absorbing floating silicone mount
• Steiner Diamond-Marine optical coatings delivering high light transmission and contrast in coastal fog
• Expansive 438-foot field of view at 1000 yards (145.4m at 1000m) across an 8.3-degree actual angle of view
• Streamlined non-compass housing reducing carry profile and overall mass on open vessel decks
• Sports-Auto Focus individual eyepiece system providing sharp viewing from 66 feet (20.1m) to infinity
• Long 20.2mm eye relief with ErgoFlex contoured eyecups shielding against side glare and wind
• Nitrogen-pressurized Makrolon chassis submersible and certified waterproof to a depth of 10m (33 feet)

High-Refraction BaK-4 Prisms & Diamond-Marine Optics

The 50mm objective lenses gather extensive photon volume, working with high-index BaK-4 Porro prisms to generate a large 7.1mm exit pupil that fully floods dark-adapted human eyes with light during nocturnal watch shifts and stormy conditions. Steiner Diamond-Marine multi-coatings maximize contrast, cutting through sea haze, ocean glare, and heavy spray to resolve navigational buoys and distant vessel hulls. Exterior lens surfaces feature Nano-Protection coatings that cause water droplets to sheet away rapidly, ensuring an unobstructed visual field in driving seas.

Submersible Makrolon Chassis & Sports-Auto Focus Mechanics

The Makrolon polycarbonate chassis delivers high structural durability while resisting corrosion from continuous saltwater exposure. Without an integrated compass module, the housing maintains a streamlined profile that reduces overall weight to 1.1 kg for agile hand-held tracking. Ergonomic ErgoFlex eyecups fold down for use with sunglasses or optical eyewear while shielding the observer eyes from peripheral sea glare and spray. The Sports-Auto Focus system keeps objects in sharp focus without requiring manual adjustment on moving vessels.

• Sports-Auto Focus individual eyepiece adjusters providing set-and-forget optical sharpness to infinity
• Submersible nitrogen-pressurized Makrolon housing resistant to extreme thermal shock and chemical corrosion
• ErgoFlex contoured rubber eyecups shielding against side glare and wind on open water

Steiner Heritage Lifetime Warranty & Marine Accessories

The Steiner 7×50 Commander Binoculars are backed by the Steiner Heritage Warranty, offering fully transferable lifetime coverage on optical and mechanical components with zero warranty card registration or purchase receipt required in North America. The complete factory package contains the Steiner 7×50 Commander binocular, hard thermo-shell carrying case, floating yellow neoprene neck strap, ClicLoc contoured neck strap, objective lens caps, and rain protection eyepiece cover.