Assertion: aperture's depth | /r/HasProperty | useful
Facets:
value: for photos like this one
type: PURPOSE
Source sentences:
text: Shallow depth of field is useful for photos like this one, where the background would have been far too distracting if it were in focus (35mm, 1/100, ISO 100, f/2).
text: A large depth of field, where you have a lot in focus, is useful if you want to show a lot of detail.