Monocular Telescope High Power 10-300x40mm HD Zoom Upgrade Portable with Tripod Phone Holder for Bird Watching Hunting Camping

High-concerned chemical : None Field of View : - Eyepiece diameter : 20mm Prism Description : BAK4 Water Resistance Level : IPX4 Objective Lens Diameter : 40mm Lens Coating Description : FMC Magnification : 10-30 Focus Type : CENTRAL Material : Metal Type : Monocular Origin : Mainland China