曝光正确与否,是一张相片摄影成功的基本保证,在自动相机中无需考虑,而在手动相机中,如不随光照的变化选用不同的曝光指数,往往就会曝光过度或曝光不足,影响相片质量。 对一般的摄影爱好者来说,买一台中高档的自动相机,有点舍不得;买低档的,又不能满足大景深或小 表1 光圈指数与光圈刻度值的关系 Exposure is correct or not, is a photo of the basic guarantee of success, no need to consider in the automatic camera, and in the manual camera, if not with the light changes in the selection of different exposure index, often overexposed or underexposed, affecting photos quality. For the general photography enthusiasts, buy a high-end automatic camera, a bit reluctant to buy low-end, but also can not meet the large depth of field or small table 1 aperture index and aperture scale value relationship