Assertion: refracting telescope | /r/HasProperty | economical
Facets:
value: very
type: DEGREE
value: because of this robust simplicity
type: CAUSE
value: compared to other telescopes
type: OTHER
Source sentences:
text: They are also very economical compared to other telescopes.
text: Because of this robust simplicity, they are very economical and popular with astronomers of all levels of ability.