Nikon Prostaff 5 Spotting 60-Straight&nbsp;with Zoom, Black Built-in Sliding Sunshade-Eliminates glare in bright conditions, keeps dust and rain off objective lens in rainy or dusty conditions. 60mm Objective Lens-Massive objective for maximum brightness. Multicoated Optics-Provides a bright, high contrast image with true color rendition. Ergonomic, Lightweight Porro Prism DesignInternal Surface Texturing-Minimizes reflective light loss inside scope. Waterproof/Fogproof-Nitrogen-purged and O-ring sealed.