巧妙校正底片,在使用单张底片放制照片时,底片在片夹中的位置往往很难校正,有时甚至就差那么一点点又要取出重来,给暗房制作带来很多麻烦。后来,笔者从整卷胶卷拉动放大中得到启示,于是找来废片头或废底片一截（约15-20cm）,与底片对接后用胶线将其对接粘 Clever correction of negatives, the use of single negatives to make photos, the film in the film clip position is often difficult to correct, and sometimes even a little bit but also to remove the heavy, darkroom production to bring a lot of trouble. Later, the author got enlightenment from the whole roll of film to enlarge the zoom, so he got a piece of waste film or scrap film (about 15-20cm), butt the film and then glue it to the sticky