Features:Eyepiece distance :18.5MMStandard:Exit pupil diameter :4MMNear focal distance:4MMMagnification: 13xPrism Glass Material :BAK4Focus System:The central focus Object lens diameter: 50mmCoating: Green filmField of view: 144m/1000mPrism system: RoofColor :BlackMaterial: Metal/rubberSize: 183*89*76.mmWeight: 435gIncluding: 1?��telescope