光圈先决单反相机是上世纪70年代末期兴起的一种经济型单反相机,它只有一种曝光模式—光圈先决自动曝光,其快门调节盘上没有速度标示,相机执行的具体快门速度可以从取景器中看到。这种单反相机都比较便宜,加上光圈先决自动曝光是公认的既能够有效控制景深效果,又能够获得正确曝光的曝光模式,很多摄影者都喜 Aperture first SLR camera is the rise of the late 70s of last century, an economical SLR camera, it has only one exposure mode - aperture priority automatic exposure, the shutter speed adjustment dial there is no speed, the camera to perform the specific shutter speed from the viewfinder In the see. This SLR cameras are cheaper, plus aperture priority AE is recognized as both effective control of depth of field effect, but also to obtain the correct exposure of the exposure mode, many photographers are happy