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Message: <blockquote data-quote="Eyelight" data-source="post: 379865" data-attributes="member: 24753">How fast depends on the distance, the detail of the subject and how  solid the camera is supported.  Distance makes for smaller details and  adds atmospheric issues.  Camera movement that twist on any axis  that is perpendicular to the line between camera and subject will be  greater at greater distances. Mirror slap, for instance, is likely to  shake the camera in a pitching motion (rotating on the horizontal axis)  which creates and angle of movement.  While the movement may be a  fraction of a millimeter at the camera, it is magnified by distance and  the greater the distance, the greater the blur.</blockquote>