Assertion: refracting telescope | /r/HasAspect | objective lens
Facets:
value: at the front of the tube
type: LOCATION
Source sentences:
text: It has an objective lens thats 1.02 meters (40 inches) across, and its total power is 195x.(The 40 inch telescope at Yerkes Observatory)Reflecting telescopes, on the other hand, dont use lenses at all.
text: Refracting telescopes have an objective lens at the front of the tube.