Zistos has combined two complementary video cameras (true thermal imaging along with a high-resolution covert video) in a single, compact, modular camera head that attaches to any of its extension poles. Optimized specifically for tactical surveillance, the THC-50D is a remote dual-mode thermal imaging camera designed to see covertly using either heat signature or standard video images to establish visual dominance over the enemy. Electronic switching between camera types is instantaneous by using the same control that provides variable IR illumination.