We have developed a wide-field imaging camera system, called WICZO, to monitor light of the night sky over extended period. Such monitoring is necessary for studying the morphology of interplanetary dust cloud and also the time and spatial variations of airglow emission. The system consists of an electric cooler a CCD camera with 60% quantum efficiency at 500nm, and a fish-eye lens with 180 ̊ field of view. Wide field imaging is highly desired in light of the night sky observations in general, because the zodiacal light and the airglow emission extend over the entire sky. This paper illustrates the design of WICZO, reports the result of its laboratory performance test, and presents the first night sky image, which was taken, under collaboration with Byulmaro Observatory, on top of Mt. Bongrae at Yongweol in January, 2004.

• S. M. KWON(Department of Science Education, Kangwon National University)
• S. S. HONG(Astronomy Program, SEES, Seoul National University)
• K. J. SHIN(Byulmaro Astronomy Observatory)