Assertion: zoom lens | /r/HasAspect | many lens elements
Facets:
value: very
type: DEGREE
value: because of the need
type: CAUSE
value: typically
type: DEGREE
Source sentences:
text: Because of the need to operate over a range of focal lengths and maintain confocality, zoom lenses typically have very many lens elements.
text: Because of the need to operate over a range of focal lengths and maintain confocality, zoom lenses typically have very many lens elements.