Nikon’s Fieldscope III 20-60x60 ED is a straight configuration spotting scope with a 60-mm objective lens. Made with Nikon’s extra-low dispersion ED glass for the sharpest image and multi-coating that improves resolution and brightness, the Fieldscope III 20-60x60 ED delivers superb optical performance. The Nikon Fieldscope III 20-60x60 ED spotting scope has a helical focusing ring and comes equipped with a 20-60x zoom eyepiece. Nikon makes a variety of fixed focal length, wide-angle, zoom and digiscoping eyepieces that fit the 60mm ED Fieldscope III. The Nikon Fieldscope III 20-60x60 ED comes with a sliding sunshade and padded view-through case. O-ring seals and nitrogen purging render the Nikon Fieldscope III 20-60x60 ED completely waterproof and internally fog-proof. The Fieldscope III 20-60x60 ED is manufactured with Nikon’s lead- and arsenic-free Eco-Glass.