The Argos 20-60x85mm HD Spotting Scope was designed to provide top optical quality in an easy to use package. It comes equipped with phase coated porro prisms that reflects ample light back into your eyes for a crystal clear, vibrant image. It also sports a rotating ring for use with a tripod to allow for the most convenient angle for observation. Features of the Argos 20-60x85mm HD Spotting Scope: Phase Coated Porro prismsFully multi coated lenses Argon gas purged Rotating ring Athlon Scopes Athlon Argos 20-60x85mm Straight Spotting Scope 314002