O-ring sealed and nitrogen purged, the Bushnell Banner 4-12x40mm Riflescope provides total waterproof and fogproof protection. A high power, variable scope for long-range centerfire shooting, this model can withstand complete immersion in water and stay dry inside, while interior optical surfaces stay fog-free even during rapid temperature change or humidity. Banner optics are coated with Bushnell's proprietary Dusk & Dawn Brightness (DDB) multi-coating process for maximum brightness and clarity in those critical first and last minutes of daylight. Additional features include an adjustable objective ideal for long-range shooting, one-piece tube construction, 1/4 M.O.A. fingertip windage and elevation adjustment, a fast-focus eyepiece, and the Multi-X reticle.