Assertion: lens's field | /r/HasProperty | useful
Facets:
value: for stellar studies
type: PURPOSE
Source sentences:
text: For example, the SOAR 4-meter telescope has a small field of view (~f/16) which is useful for stellar studies.
text: It can be used for candids, street photography, and other situations where a somewhat narrower field of view compared to the standard 50 mm lens is useful.