Assertion: newtonian telescope's length | /r/HasProperty | equal
Facets:
value: to its focal length
type: OTHER
value: roughly
type: DEGREE
value: further
type: DEGREE
Source sentences:
text: Further, its length is about equal to its focal length.
text: The effective focal length of the telescope and the overall physical length of Mak-Newt telescopes are about equal to the focal length.
text: The effective focal length of the telescope and the overall physical length of Mak-Newt telescopes are about equal to the focal length.
text: Because they use a single primary mirror to direct light back to a flat secondary mirror, which in turn reflects light to the eyepiece at the side of the tube, the physical length of a Newtonian is roughly equal to its focal length.