Features Wide 64.3Adeg apparent angular field of view All lenses are multilayer coated for bright images Utilizes Nikon&';s high-eyepoint design for a comfortable viewing experience Can be attached to a tripod using the optional tripod adaptor Fully waterproof/fogproof: Nitrogen-filled and O-ring sealed Long eye-relief design ensure a clear field of view, even for eyeglass wearers Wide Field of View Individual Eye Focus Long Eye Relief Tripod Compatible with optional adapter Multilayer Coated Lenses Waterproof/Fogproof