Change the 20-60x zoom eyepiece that comes standard with their premier spotting scope for this fixed-magnification Burris Optics Signature HD 30x Wide Angle Eyepiece. Engineered to the same standards as the spotter, the eyepiece has a proprietary bayonet-style mount to enable quick and easy changes, as well as the low-dispersion glass and index-matched optical coatings, so views through the eyepiece are contrast-rich, with accurate color representation, without distortion across the entire wide 64° field of view. Argon-filled and O-ring sealed, the optical system is waterproof and fogproof in nearly all conditions.