DN LENS           This lens is a sophisticated optical apparatus, that effectively converts the 2.8x riflescope into a 5.6x riflescope. The resulting apparatus allows sharper (closer) observation of remote objects at night. The unit utilizies an advanced high precision lens design, which allows high performance in a compact size.     DN LENS CASE     Specifications Lens focal length, mm Field of view, Focus range, m Dimensions, mm Weight, kg     70 9° 10 79x74.2x56 0.350