Night vision binocular 2X42, high quality low light tube, high quality optical system, provide very good performance Lens magnification ,x2X424X50Objective lens diameter,mm4250Lens system50mmF/1.280mmF/1.7FOV at distance 100m/110yards,m19/6316/52Field of view,deg1812.5Focus range,m1.5 to infinity1.0 to infinityExit pupil diameter,mm6Eyepiece Dioper adjustment,dptr+4,-4Eye relief,mm15Power supply, ...