论文部分内容阅读
1 9 3 8年,德国著名的K W(Kamera Werkst?tten)公司推出了PraktiflexⅠ型相机。相比Exakta 135单反相机,该机最大的创新在于:反光镜上下运动与快门不联动,也就是说它的反光镜采用了非快门同步即时返回式设计,反光镜只是随手指下压或抬起做上升或下落运动。具体操作情况是这样的:只要手指抬起,反光镜就会下落,便于再次取景,同时也可观察前一次照片拍摄的瞬间情况。它不会像Exakta 135
In 1983, the German company Kamera Werkstätten introduced the Praktiflex I camera. Compared with the Exakta 135 SLR camera, the biggest innovation of this machine is that the mirror does not move up and down and the shutter does not move, that is to say, its mirror adopts a non-shutter synchronous instant return design, and the mirror just presses or lifts with the finger Do ascending or descending movement. The specific operation is like this: As long as the fingers raised, the mirror will fall, easy to view again, but also observe the previous photo of the moment. It does not look like Exakta 135