The new Nikon Prostaff Rifle Scope is packed full of upgrades to satisfy the most demanding hunters and shooters. The fully multi-coated lens system provides up to 98% light transmission so there will be no worries about shooting at, dawn, dusk or even on cloudy days. The finger adjustable turrets of the Nikon Prostaff allow the user to make quick adjustments in the field, and they are also resettable to zero. All Prostaff scopes are nitrogen filled and o-ring sealed and have generous eye relief. All Nikon products include Nikon USA's full or limited warranty. Nikon Prostaff Rifle Scopes are covered by a lifetime factory warranty.