The ZULU9 combines superior optical performance. High quality glass, fully multi-coated Spectracoat lenses, and phase-coated Abbe-Konig prisms provide maximum brightness, contrast and crisp resolution. The ZULU9 performs in the harshest conditions, giving unmatched performance in inclement weather or rugged terrain. ZULU9 barrels are nitrogen-filled and will not fog in cold, wet weather. Waterproof and fog-proof performance -ZULU series binoculars are IPX-7 rated for complete immersion in up to a meter of water.
Key Features:

• ZULU series binoculars incorporate a rugged and durable magnesium housing that is tripod-compatible
• Durable rubber armor protects and provides an ergonomic non-slip grip design
• Multi-position twist-up eyecups create generous eye relief
• Waterproof and fog-proof performance

Sig Sauer Zulu 9 15x56mm HDX Lens Binocular, Graphite Specifications:

• Magnification: 15x
• Objective lens diameter (mm): 56 mm
• Field of view: 4.5
• Eye relief: 17.8
• Overall length: 8.2
• Weight: 43.2
• Near focus (m): 9.8
• Interpupilary distance (mm): 56-75
• Prism type: HDX Abbe Koenig
• Coating type: LensArmor / LenShield / SpectraCoat
• Frame material: Magnesium
• Diopter adjustment range: /- 3
• Waterproofing: IPX7
• Tripod mount: Yes