S J Security Systems Pvt. Ltd. Offers Vari Focal M.I., Pin Hole, Screw Type Lenses. It is a tool for resellers. The focal length of these lenses can be changes as per the requirements of the client. S J Security Systems Pvt. Ltd. Offered Vari Focal M.I., Pin Hole, Screw Type Lenses are used for spy applications and can be fitted on regular board camera modules.
