摘要：20世纪最伟大的摄影家安塞尔亚当斯归纳多人的经验而发明的“分区系统”。它是大师留给后人的一份最为珍贵的遗产。自从彩色摄影开始普及后，因彩色胶片及图片制作的技术要求非常严格，所以这些操作一般不是个人可为的。再加上近几十年来的相机产品多附有自动曝光功能，许多摄影爱好者和专业摄影师就不再考虑那么多了，只是将相机设置在自动模式上进行拍摄，。拍摄后的一切工作有都是交给专业图片店去完成，所以分区系统就显得并不是那么重要了。久而久之，许多人把分区系统忘记了，甚至许多从事专业摄影工作的摄影师，也基本不了解什么是分区系统。

　　　而HDR作为新兴的摄影技术，受到了很多摄影人的喜爱。究其原因，是其强大的画面表现力，能够在一张照片上将丰富的层次表现出来，那么它的原理到底是什么，为什么会有这么好的画面冲击力和表现力？

　　　分区曝光系统和HDR之间到底有着什么样的关联呢？对我们的实际拍摄又有着什么样的意义呢？

关键词：预想；曝光量级别；HDR；衍生技术

Abstract：20th century's greatest photographers Ansel Adams summarized the experience of more than the invention of the "district system." It is left to future generations a master of the most precious heritage. Since the popularity of color photography began after the color film and photographs made by the technical requirements are very strict, so these operations are generally not personally order. Plus more products in recent decades with the camera auto-exposure feature, many photography enthusiasts and professional photographers will no longer be considered so much, just set the camera to shoot in automatic mode. After shooting all the work has been to the shop to complete the professional image, so the partition system becomes not so important. Over time, many people forget to partition the system, and even many in the professional photography photographer, basically do not understand what is the partition system. 

    The HDR photography as a new subject to a lot of photographers alike. The reason is the power of its powerful performance of the screen, a photo will be able to enrich the level of performance, then, what is its principle in the end, why there is such a good impact and expressive images? Partition between the exposure system and the HDR in the end what kind of association with it? The actual shooting and our What has been the point? 

Keywords: expectations; exposure level; HDR; Derivatization