照相机主要由照相物镜、快门和机壳组成。照相物镜的质象,曝光量(包含快门速度和光圈误差)正确与否,以及卷片机构可靠耐用是照相机的主要性能指标。 一 照相物镜 物镜是照相机的成象系统。照相机的成象质量直接与物镜的质量(设计、加工和装调)有关,还与物镜的装定(后工作距离是否与胶片面重合),以及调焦精度有关。换句话说:对于一个精良的物镜,如果装定得不正确(俗称焦面不对),或调焦误差超出焦深,也无法得到一个清晰的象。因此,在测定照相机的成象质量之前,必须先对物镜 Camera mainly by the camera lens, shutter and chassis composition. The quality of the camera objective, the amount of exposure (including shutter speed and aperture error), and the reliability of the take-up mechanism are key performance indicators of the camera. A photo objective The objective lens is the camera’s imaging system. The image quality of the camera is directly related to the quality of the objective (design, processing, and setup) and to the objective setting (post-work distance coincides with the film surface) and focus accuracy. In other words: For a good objective, if not properly set (commonly known as the wrong face), or focus error beyond the depth of focus, can not get a clear image. Therefore, before measuring the image quality of the camera, you must first look at the objective lens