Assertion: coma | /r/HasProperty | common problem
Facets:
value: on photographic lenses
type: LOCATION
value: on telescopes
type: LOCATION
value: on microscopes
type: LOCATION
value: relatively
type: DEGREE
Source sentences:
text: Coma is a relatively common problem on telescopes, microscopes and photographic lenses, and it is often most visible at wide lens apertures.