现场勘查时，遇到诸如屋顶、墙根、气窗窗框、容器内壁等特殊部位的痕迹，ＤＦ照相机往往无法取景拍摄，通常有一种简单方法，即通过平面镜改变取景方向，完成拍照。但要固定单片平面镜，使它与被拍平面成４５°角，既费时又极易毁坏痕迹，取证人员心理压力较大。笔者建议，用 Scene exploration, encountered such as roof, wall roots, window frames, container walls and other special traces of the site, DF camera often can not framing, there is usually a simple way, that is, through the flat mirror to change the viewing direction to complete the photo. However, to fix a single piece of flat mirror so that it forms a 45 ° angle with the plane being photographed, it is both time-consuming and easily destroyed, and the forensic personnel are under more psychological pressure. I suggest, use