Recently, we have set up a new digital CCD camera system, MicroMax YHS-1300 manufactured by Roper Scientific for Hα observation by Solar Flare Telescope at Bohyunsan Optical Astronomy Observatory. It has a 12 bit dynamic range, a pixel number of 1300×1030, a thermoelectric cooler, and an electric shutter. Its readout speed is about 3 frames per second and the dark current is about 0.05 e-/p/s at -10°. We have made a system performance test by confirming the system linearity, system gain, and system noise that its specification requires. We have also developed a data acquisition software which connects a digital camera con-troller to a PC and acquires Hα images via Microsoft Visual C++ 6.0 under Windows 98. Comparisons of high quality Hα images of AR 9169 and AR 9283 obtained from SOFT with the corresponding images from Learmonth Solar Observatory in Australia confirm that our Hα digital observational system is performed properly. Finally, we present a set of Hα images taken from a two ribbon flare occurred in AR 9283.

• C.-W. LEE(Bohyunsan Optical Astronomical Observatory, Korea Astronomy Observatory)
• Y.-J. MOON(Bohyunsan Optical Astronomical Observatory, Korea Astronomy Observatory)
• Y.D. PARK(Bohyunsan Optical Astronomical Observatory, Korea Astronomy Observatory)
• B.-H. JANG(Bohyunsan Optical Astronomical Observatory, Korea Astronomy Observatory)
• KAP-SUNG KIM(Department of Astronomy and Space Science, Kyung Hee University)