Specifications: Product model: TM911 Magnification: 10x Mirror material: reinforced ABS Rubber material: environmentally friendly PVC Objective lens aperture: 42mm Eyepiece diameter: 18.5mm Exit pupil diameter: 4.2mm Pupil exit distance: 15mm Field of view angle: 6.5 ° Field of view range: 114m/1000m Field of view: 341ft/1000yds Close focus distance: 3m Adjustable range of pupil distance: 59-74mm Adjustable range of visibility: ± 4dpt Focusing method: central focusing Focusing lens: objective system Prism system: ridge system Prism material: BAK4 Objective lens composition: 2 sets and 3 pieces on one side Eyepiece composition: 3 sets and 4 pieces on one side Lens coating: broadband Anti-reflective coating Prism coating: reflective film Waterproof and anti fog: IPX7 nitrogen filled waterproof Eye cup type: rotary eye mask Can be connected to a tripod: Yes Shoulder strap: Nylon tied at both ends Soft bag: Nylon soft bag Mirror wiping cloth: commodity cotton cloth Product size: 133 * 65 * 165mm Product weight: 655g