放大程序是:光线透过底版,通过镜头聚焦到成影版(感光纸)上,再经过显、停、定影处理,得到一张与原景物相同的影象。一、放大技术的基本要求 1.凡要进行放大的底版,其对角线都不得超过集光镜的直径和镜头的焦距。否则,照片的四角和周围,会出现光线不匀、不清楚、变形等现象。这叫做“涵盖力”不足。如果底版很小,所用镜头的焦距较大,放的照片又较大,镜头离成影版的距离太 Amplification process is: Light through the bottom plate, through the lens to the imaging version (photosensitive paper), and then through the show, stop, fixing process, get a picture with the same original scenery. First, the basic requirements of the magnification technology 1. All to enlarge the bottom plate, the diagonal must not exceed the diameter of the condenser lens and the lens focal length. Otherwise, the four corners of the photo and around, there will be uneven light, unclear, deformation and so on. This is called inadequate coverage. If the bottom plate is very small, the focal length of the lens used is larger, and put a larger photo, the distance from the imaging lens too