Engineered to optimize its low-light performance, Hawke Sport Optics' green 10x56 Endurance Binocular features a high magnification and large objectives that produce a 5.6mm exit pupil that completely covers most users' pupils when they fully dilate as conditions darken. To help reduce the appearance of visible hand-shake common with high-power optics, they are outfitted with a wide viewing angle. They sport a fully multi-coated lens system and phase-corrected BAK4 prisms to produce bright and clear, high-contrast images from dawn to dusk, and under heavy cloud cover or dense canopies. With the ability to achieve focus within seven feet using a fast focus mechanism, the Endurance is ready for almost any intermediate to long-range glassing task.
Aptly named, it is built to endure a life lived outdoors in harsh conditions. To help offset the weight of the large objects, the Endurance sports a lightweight and corrosion-resistant aluminum alloy chassis. The optical tubes are nitrogen-filled and O-ring sealed to be water and fogproof - especially when moving through extreme temperature changes. To reduce user-fatigue and keep them steady, they are tripod mountable with an optional adapter, available separately. A right-eye diopter adjustment allows the binocular to be customized to most people's prescription needs, and the twist-up eyecups provide comfortable use with or without eyewear.
Optical Performance
 
Strong 10x magnification
Large 56mm objectives
Compact BAK4 roof prisms
Anti-reflection fully multi-coated optics improve color rendition, contrast, and overall image brightness
Phase-corrected prism coatings reduce internal light dispersion, improves contrast, and color fidelity
321' field of view at 1000 yards
Wide 61° apparent field of view
Comfortable 5.6mm exit pupil covers most pupils when fully dilated in low light conditions and reduced noticeable hand-shake
Long 23mm eye relief
Use and Handling
 
Close bridge configuration
Large knurled center focus wheel
Fast focus mechanism moves through entire focus range in just 1.5 turns
3-stage twist-up eyecups for use with or without eyewear
60-76mm interpupillary adjustment range
Right eye dioptric correction
Tripod mountable with optional adapter
Construction Details
 
Lightweight and durable aluminum alloy chassis
Nitrogen-filled housing for fog and waterproof performance
Green armoring to protect the chassis from impacts and deep side grips provide secure slip-resistant handling
Stay-on flip-down objective lens covers
Weight: 37 oz