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在摄影时,如果被摄物体在摄影仪器的景深方向比仪器的景深大,这时可以让一束宽度比景深小的光束投射到被摄物体上,当在仪器的景深方向连续地移动被摄物体时,则可在仪器的成象面上获得被摄物体的整个影象。曝光时,光源是固定不动的,只需通过照象系统的前焦面机械地移动被摄物体即可。因此,焦面以外的物体部分在整个曝光期间是暗的。本文介绍的Dynaphot仪主要是由一个或几个能投射一束细光束的灯泡、一个能沿着摄影仪器的光轴方向移动被摄物体的载物台和一个照相机组成。该仪器的有效放大倍率大约是100倍左右,而4～500倍的放大倍率在技术上也是可以办得到的。
When shooting, if the subject in the depth direction of the camera than the instrument’s depth of field, then you can make a beam width smaller than the depth of field projected on the subject, when the camera in the direction of the depth of field continuously moving Object, you can get the entire image of the subject on the imaging surface of the instrument. When exposed, the light source is stationary, moving the subject mechanically only through the front focal plane of the camera system. Therefore, the part of the object other than the focal plane is dark during the entire exposure. This article describes the Dynaphot instrument is mainly composed of one or several light bulbs can project a beam of light, a camera along the optical axis direction of the object moving the stage and a camera. The effective magnification of the instrument is about 100 times, while 4 ~ 500 times the magnification is also technically possible.