Features:Eyepiece distance: 14.8MMStandard: 15-55X21Exit pupil diameter: 3MMNear focal distance: 10mmMagnification: 15x-55xPrism Glass Material: BAK4Focus System: The central focusObject lens diameter: 21mmCoating: Blue filmField of view: 83m/1000mPrism system: RoofColor: BlackMaterial: Metal/rubberSize: 10.5x3.2x3.2cmWeight: 80gIncluding: 1?��telescope +1?��cleaning cloth， nylon bag， Instruction， Mirror line， Desiccant， Certification， Warranty Card， Color box.