1)name:day and night board lens; 2)focal length:4mm; 3)aperture:1/1.8; 4)mount:M12*0.5; 1)name:day and night board lens;2 ... )focal length:4mm;3)aperture:1/1.8;4)mount: ... requirement.The aperture of lens are 1/1.2,1/1.4,1/1.6,1/1.7,1/1.8,1/2.0 and so on ...M.O.D ... 0.1,0.15(m)The mount of lens are CS,M12*0.5The weight to different camera lens ...