Donegan OptiVISOR LX Binocular Magnifier-Lensplate #4 Magnifies 2X At 10" Focal Length

Please note: number on the lens designates the diopter, not the magnification, Magnifies 2X at 10" focal length, Matched set of Lenses prismatically ground and polished to precise optical standards, Lens conveniently flips up and away when not in use, Ergometric soft genuine leather headband backed with wool felt designed from natural material to help wick moisture away