SUPOW(TM) Outdoor Travel Super Clear Monocular Dual Focus Telescope Optics Zoom Monocular Scalable Telescopic 66m/8000m For Birds/Hunting/Camping/Hiking Armoring This monocular offers an 16x magnification and a 52mm objective diameter. Dual Focusing. Multi-coated optics upgraded version of the green AR. Rubber Armored for rugged field use center focusing mechanism. The fully coated optics, meanwhile, guarantee superior light transmission and brightness, helping you see just about any target, whether you're searching for birds or trying to get a better view of the stag. Field of View: 66M/ 8000M; Field of view: 6.5; Eye Lens Diameter: 16mm ; Objective lens diameter: 52mm.