Pulsar Telos LRF XG50 Thermal Monocular with Laser Range Finder (Certified Refurbished)Objective ring zoom control You can ideally adjust the image in Telos with one hand the focusing and smooth zoom rings are located on the lens in the classic layout, one by one, as in professional camera objective lenses. The consistent arrangement of the rings enables getting a clear image with the required magnification quickly and with minimal effort. Intuitive user experience For a more tactile and intuitive use of Pulsar flagship handhelds,