Nikon Prostaff 3-9x40 Rimfire Scope Packed full of upgrades to satify the most demanding hunters and shooter. 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 adjustable in field, and they are also resettable to zero. All Prostaff scopes are nitrogen filled and o-ring sealed and have generous eye relief.