We have Auto Iris and Manual Iris Lenses for Professional Box CCTV Cameras. C-Mount Type with Variable Focal Length. These lenses need to be used with box cameras. Professional Box Cameras usually do not come with the Lens and they will not work until proper CCTV Lens is installed. High Quality Lens is a must for a High Quality Picture. We Have the Best Quality Lenses. From Standard 3.5~8mm to Zoom Lenses with up to 100mm Focal Length.