The FIND-R-SCOPE 85204 12.5 - 75 mm Zoom Lens is for use with the units that have the C-Mount capability. It is an f/1.8 speed lens with macro capability and built in iris.

When used with Infrared Viewers that have a C-Mount lens mount option, this optional lens can provide a narrower field of view and larger display of target than standard lens. Built in is a manual iris that can be used to control intensity and increase the depth-of-field. This helps to reduce the necessity to refocus for changes in distance.