Motion blur
  This blog will introduce what I have learned about the knowledge of motion blur in photography. Motion blur is the apparent streaking of moving objects in a photograph or a sequence of frames, such as a film or animation. It results when the image being recorded changes during the recording of a single exposure, due to rapid movement or long exposure.
  When a camera creates an image, that image does not represent a single instant of time. Because of technological constraints or artistic requirements, the image may represent the scene over a period of time. Most often this exposure time is brief enough that the image captured by the camera appears to capture an instantaneous moment, but this is not always so, and a fast moving object or a longer exposure time may result in blurring artifacts which make this apparent.

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  In the two images, we can see the impact of using motion blur, the objects have become vague, this can show the beauty of moving, and using motion blur can also uesd to make photos on the night sky, in the long exposure photo of night sky, the diurnal motion leaves star trails in exposures just like the third photo. Among the three images, I like the second one best, it is a subway tunnel, by using motion blur, this tunnel has been looked like endless, and the light using in this image is bright, there is a contrary between the grey and the red color in this image.
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