how to shoot motion blur

Using ND Filters to create Motion Blur in Bright Sun – How We Shot It

In this video, Matthew Saville describes the various methods and options available for creating a slow motion blur during bright sunny conditions. For anyone who knows the "Sunny Sixteen" rule, if your aperture is at f/16 then a perfect exposure at ISO 100 would be 1/100 sec, and a perfect exposure at ISO 400 would be 1/400 sec, and so on. However this image was created at f/13, ISO 100, and 2.0 seconds.