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1993年11月8日夜,汝州市人民武装部发生一起特大盗枪案,被盗“五四”式手枪12支,“六、三”式自动步枪3支,子弹750余发,现场勘查中,在二号、三号库分别发现指纹和鞋印,当时现场没电,仓库有炸药,在这种情况下,我利用现场勘查灯进行拍照,经过多次实验,拍出的指纹和鞋印不佳,使照片出现光斑,光线有不均现象,用两只手电进行游动配光拍照,使用小光圈、长时间曝光,经过多次实验,使照片上的光斑消除,光线比较均匀,照片上的指纹能清晰地再现出来,效果理想。具体拍摄方法是用三角架或云台固定相机(海欧DF-135型),加上接圈,装上上海产135全色黑白胶片,上快门。为增加清晰度,使用小光圈(F11-F16)慢速度,将相机镜头光轴垂直拍物体所在平面,并选择合适的比例尺,选好用光照角度
On the night of November 8, 1993, an extra-large bandit case was committed in the Armed Forces of the Ministry of People’s Armed Forces of Ruzhou City, in which 12 “5 4” pistols, 3 “six or three” automatic rifles, more than 750 rounds of bullets During the on-site survey, fingerprints and shoe prints were found on the No.2 and No.3 warehouses respectively. At that time, there was no electricity on site and there were explosives in the warehouses. In this case, I took pictures with on-site inspection lights. After many experiments, Fingerprints and shoeprints are poor, so that photos appear spot, the light is uneven, with two flashlights swimming light distribution photos, the use of small aperture, long exposure, after many experiments, to eliminate the light spots on photos, light More uniform, photos on the fingerprint can be clearly reproduced, the effect is ideal. The specific method is to use a tripod or PTZ camera (Haiou DF-135 type), coupled with the ring, loaded with 135 full-color black and white film production in Shanghai, the shutter. To increase clarity, use a small aperture (F11-F16) slow speed, the camera lens perpendicular to the optical axis of the subject plane, and select the appropriate scale, choose the best use of light angle