Assertion: telescope's eyepiece | /r/HasProperty | useless
Facets:
value: on own
type: MANNER
value: nearly
type: DEGREE
Source sentences:
text: Most hobby killers will come with a 4-mm eyepiece, which is nearly useless on its own, but it will also come with a Barlow lens, which increases the magnification of whatever eyepiece you put into it.