When imaging for long periods in low temperatures, dew can form on the lens. The Lunatic ZeroDew controller allows up to 4 dew tapes to be connected to a single power supply. It has a variable output control to allow a higher power level to be set initially then turned down once the system is at temperature. This allows for significant power saving. The dew controller is supplied with a Cigar Lighter type dc power plug. A 5.5mm DC socket can be provided at no extra cost if requested.