sorry I cannot write in Korean now from my office. I know that there isn't an explicit borderline between flare and ghost, but typical example for each would be: ghost: http://www.geocities.co.jp/SilkRoad-Ocean/6308/87.jpg flare: http://isweb13.infoseek.co.jp/travel/ns63/1v-15-14.JPG both are from my home page, using the same lens. (EF135/2L) I thought what you first mentioned belonged to ghost rather than flare? by the way, ghost picture is taken at ChinJu, and the flare picture was taken in the area around Ewha Women's Univ. nsns