... /1.8; 4)mount:M12*0.5; 1)name:day and night board lens;2)focal length:4mm;3)aperture:1/1 ... ,3.6,25,4,6,8,12,16 (mm) etc or as your requirement.The aperture of lens are 1/1 ... .6,1/1.7,1/1.8,1/2.0 and so on ...M.O.D of lens are 0.2 ... one interesting to you,please contact me freely by email or call me directly. Please send me specific inquiry then I ...