Steiner Nighthunter LRF 8x30  Binocular 28ounce 2300 Instant laser-accurate ranging to 1,860 yards, Scan mode to continuously measure moving targets Porro Prism design produces three-dimensional depth perception and massive field of view to quickly locate and accurately evaluate your target Sports-auto Focus System lets you Focus each Eyepiece to your vision once, then keeps images Razor sharp from 20 yards to Infinity. No more chasing Focus on moving targets N2 Injection System seals 14-psi pressurized dry Nitrogen into the optic, for fog proof clarity in any Condition - from artic cold to Desert heat Makrolon housing is durable Polycarbonate with NBR long life rubber armoring, creating a lightweight, rugged chassis that withstands 11 gs of impact. Impervious to harsh conditions for generations of trusted Use Porro Prism Design: produces three dimensional depth perception and massive field of view to quickly locate and accurately evaluate your target Sports-Auto-Focus System: lets you focus each eyepiece to your vision once, then keeps images razor-sharp from 20 yards to infinity Comfort Grip System: textured rubber armoring and soft Techno Gel thumb pads reduce hand fatigue over long periods of scouting or viewing Waterproof: to 16 feet seals dry nitrogen into the tubes to lock out fog, rain, snow, water, grit and dust Provides compact, lightweight 3-D viewing, instant laser-accurate ranging to 1,860 yards; Scan Mode to continuously measure moving targets