Assertion: newtonian telescope's length | /r/HasProperty | large
Facets:
value: as the aperture
type: OTHER
Source sentences:
text: This means that the focal length is 10 times as large as the aperture.
text: Focal length is the large number you'll often see printed or engraved on the front or back of the scope, usually between about 400 and 3,000 millimeters depending on the scope's aperture and type.