I have a Nikon PROSTAFF 5 Rifle Scope 3.5-14X 40mm Side Focus BDC The Nikon PROSTAFF 5 Rifle Scope is designed with features to satisfy the most demanding hunter. The ultra-bright lens system gathers every glimmer of fading light for 95% light transmission, letting you take the shot of a lifetime when inferior optics are already packed up for the night. The sleek PROSTAFF 5 features spring loaded zero-reset hand turn turrets, crystal clear 4x power range, fast focus eyepiece and consistent four inch eye relief. The PROSTAFF-5 series of rifles scopes are compatible with Nikon's SPOT ON Ballistic Match Technology and are an elite optic that will prove its worth time and time again in the field or at the range.