一张成功的黑白照片除构图优美外，还应影调层次丰富。反差适中、密度正常、画面整洁。初学摄影者，通过拍照及暗房冲洗后得到的照片，往往会出现各种差错；由于缺乏经验及理论功底，不能分析失败原因而难于提高技艺。同样，一张成功的彩色照片在构图合理基础上，既要考虑黑白 In addition to the composition of a successful black and white photos, but also the level of rich tone. Moderate contrast, normal density, clean images. Beginners photographers, photos taken after taking photographs and darkroom rinse, often appear various errors; due to lack of experience and theoretical foundation, can not analyze the reasons for failure and difficult to improve the skills. Similarly, a successful color photos in the composition of a reasonable basis, it is necessary to consider black and white