subject: Smartec Day/Night camera for small business [print this page] New STC-3009 supports all types of lenses allowing customer to use Smartec camera in low light conditions. For example, STC-3009 Day/Night camera can work with vari focal model STL-2712DC or STL-40FFDC lens with fixed focal length. Also new this Day/Night camera can work with lenses with AI (auto iris, controlled by video or DC signal.