What's panning? It's the photo technique that seems to freeze an object in motion against a blur of background movement. Slowing your shutter speed is the heart of a good pan and critical to creating a motion blur:
The actual shutter speed depends on the speed of the subject but generally it will be 1/200th or slower. 1/200th if your subject is really flying along, like a speeding car on a race track, and maybe as slow as 1/40th of a second if your subject is a runner on a track.
Steady hands or a tripod with a nice ball head are a must for a smooth pan. For more tips and example photos, check out the rest of the tutorial below. Photo by tinou bao.