Assertion: shutter's speed | /r/CapableOf | blur the background
Facets:
Source sentences:
text: Shutter speed can also be used to keep the subject sharp while blurring the background.
text: The idea behind this technique is that you follow a moving object with your camera, and take the photo with a slow enough speed to blur the background.
text: A shutter speed of around 1/25th is a good starting point to blur the background while keeping the cyclist sharp.