The steiner m1580 reticle & compass is for visual efficiency extended-viewing comfort and object detail.Traditional spotting scopes cant compare to these high power military binoculars.Originally developed for perimeter and border patrol applications they now serve military and law enforcement agencies around the world.The massive 80mm objective lenses and unmatched steiner quality deliver far superior low-light performance and image acuity for artillery teams seal missions surveillance missions air traffic controllers forest fighters and naval patrols.Integrates a large hd stabilized compass for accurate bearings fluid damped to eliminate degree variance while underway in a vehicle or ship.Features a versatile ranging reticle found on all "r" models that be used to judge both the height and distance to a target.Floating prism system uses flexible silicone lens mount to absorb severe shock impact and abuse without damage multi-coated optics are state-of-art for brighter picture higher contrast and sharply contoured images with natural color definition sports-auto focus system lets you focus each eyepiece to your vision once then keeps images razor sharp from 20 yards to infinity makrolon housing is durable polycarbonate with nbr long life rubber armoring creating a lightweight rugged chassis that withstands 11 gs of impact.Includes tripod mount neck strap objective cover and rain protection cap.Magnification: 15xObjective: 80mmField Of View: 301 ft @ 1 000 ydsExit Pupil Diameter: 5.30mmShort Focus: 197 ftPrism Type: FloatingWeight: 69.30 ozFinish: Green Rubber ArmorFocus Type: Sports-Auto FocusOptic Coating: Multi-CoatedProofs: Fog/Waterproof