This configuration is ideal for the long-range hunters. The large 50mm objective gathers maximum light, which comes in handy when ranging distant targets at up to 24x magnification. Exclusive EXO Barrier Protection - Bushnell's newest and best protective lens coating molecularly bonds to the glass, repelling water, oil, dust, debris and preventing scratches. IPX7 Waterproof construction - O-ring sealed optics stay dry inside, when immersed in three feet of water for up to 30 minutes. Ultra-wide Band Coating - Anti-reflection coating applied to both lenses and prisms, for the best possible light transmission.