Visionking Monoculars 10-25x42 Portable Zoom Monocular for Hunting Power:10x-25x Objective:42mm,Size Classmm: 174x50 Focus System: Center,Prism System: Roof Prism Class: BaK-4,Lens Coating: FMC,FOV, ft./1000yds: 170-128 Light weight,Compact design,Durable Rubber Armored