Assertion: lens's lens hood | /r/HasProperty | useful
Facets:
value: in preventing flare
type: PURPOSE
value: very
type: DEGREE
value: because of its shape
type: CAUSE
Source sentences:
text: On the other hand (and more importantly), because of its shape, the lens hood is very protective and very useful for this lens.
text: However, even a lens hood is only useful in preventing flare at certain angles.