Product specifications: 20X50 <br />Prism Type: BAK-4<br />Magnification: 20X<br />Eyepiece diameter: 22MM (large eyepiece design) <br />Objective Diameter: 50mm <br />Angle: 8.2 degree<br />Minimum focusing distance: 5.0m <br />Exit Pupil Diameter: 4.1mm <br />Horizon: 17mm <br />Relative brightness: 25.00 <br />Water fog: Yes <br />Tripod Adapter Interface: Yes<br />Accessories: backpack， strap， lens cap， eyepiece cap， lens cloth， drying， packing boxes. <br />Size: 190X175mm (WxH)<br />Weight Net: 810g <br />Total weight: 1050g