Assertion: lens's depth | /r/HasProperty | useful
Facets:
value: in taking photos of people
type: TEMPORAL
value: really
type: DEGREE
Source sentences:
text: This allows photographs to be taken in lower light conditions without flash, and allows a narrower depth of field, which is useful for blurring the background behind the subject, making the subject more prominent.
text: The combination of a flattering focal length, being very sharp, and a narrow depth of field can be really useful in taking photos of people.