Assertion: newtonian telescope's length | /r/HasProperty | compact
Facets:
value: very
type: DEGREE
Source sentences:
text: This creates lenses with focal lengths from 250 mm up to and beyond 1000 mm that are much shorter and compact than their long-focus or telephoto counterparts.
text: By folding the light path, the SCT provides a long focal length is a very compact tube.