uxcell CCTV Security Camera Replacement F1.2 4mm Focal Length Monofocal Manual Iris Lens Product Name: Monofocal Manual Iris Lens; Fit for: CCTV Camera Focal Length: 4mm; Horizonal Field: 78 Degree; Aperture(F): 1.2 Mount: CS; Format(Inch): 1/3; M.C.D(m): 0.1 Dimension (without cap): 29 x 28mm / 1.14 x 1.1inch(L x D) Zoom and focus outside adjusting; Suitable for wall and celling installing