We developed an observation program for a 2K CCD camera, which was newly attached at the SOAO (Sobaeksan Optical Astronomy Observatory) 61cm telescope. The program was designed to control the telescope as well as the CCD camera and to monitor the CCD image quality, with very easy under the window-based graphical user interface (GUI). Furthermore, applying the automated differential photometric algorithm, we can obtain the instrumental magnitudes of several variable and comparison stars in real-time. Simultaneous photometry enables us to get precise differential magnitudes of variable stars even if the weather condition is not photometric. This new observation system has been using for many astronomical observations from September, 2001.

We have developed and tested a CCD camera (100 × 100 pixels) system for observing Ha images of the solar flares with time resolution> 25 msec. The 512 × 512 pixels image of CCD camera at 2 Mpixels/sec can be recorded at the rate of more than 5 frame/sec while 100 × 100 pixels area image can be obtained 40 frames/sec. The 100 × 100 pixels image of CCD camera corresponds to 130 × 130 arc - sec2 of the solar disk.