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1962年,西德的蔡司·依康公司发表了CONTAFLEX Super B型,福伦达公司发表了ULTRAMATIC型照相机(图1)均有快门优先光圈自动功能,但因其采用的是外部测光技术,精度不高,适用性有限。1965年福伦达公司又推出ULTRAMATIC CS型照相机,虽然采用了通过镜头测光的技术,但其综合性能并不先进,如非即时返回式反光镜,曝光后取景屏一片漆黑,无法再次取景。镜后中心快门的单镜头反光曝光过程复杂,时滞较长,故障率高,在135单镜头反光照相机发展历史中未显地位,因上述相机
In 1962, the Zeiss Ekon company in West Germany published the CONTAFLEX Super B model. The company released the ULTRAMATIC camera (Figure 1) with the shutter priority aperture automatic function. However, because of its external metering technology, Accuracy is not high, limited applicability. In 1965, Fullerton launched the ULTRAMATIC CS camera. Although it adopted the technology of passing the photometric lens, its overall performance was not advanced. For example, the instant return mirror did not have a bright viewfinder and could not view the screen again. After the lens center shutter single lens reflex exposure process is complex, longer delay, high failure rate, 135 single lens reflex camera development history did not significant position, due to the camera