... ,8,12,16mm; 3)Mount:M12*0.5/phi14.0; 4)aperture:1/1.2 1)name:board lens;2)focal ... length:4,6,8,12,16mm;3)Mount:M12*0.5/phi14 ... .0;4)aperture:1/1.2We are the manufacturer of board lens ... .There are 2.1,2.5,2.8,3.6,25,4,6,8,12,16 (mm) etc or as your requirement ... .The aperture of lens are 1/1.2,1/1.4,1/1.6,1/1.7,1/1.8,1 ...