Cameras in outdoor areas often have to contend with adverse weather conditions and unfavourable atmospheric conditions. Fog, drizzle, smog or smoke can affect the image quality to the extent of making it unrecognisable. The defog feature of the new Candid and Callisto provides the remedy for this. It analyses the uncompressed video signal pixel by pixel in real time. Then the colours, contrast and sharpness of the optical signal are retouched. In this way, the camera delivers images on which objects and persons are identifiably, even in dense soup.