Assertion: modern eyepiece | /r/MadeOf | few components
Facets:
value: for the 28 mm rke eyepiece
type: PURPOSE
value: typically
type: DEGREE
Source sentences:
text: Modern eyepieces typically consist of the few components, shown in the cutaway diagram (below) for the 28 mm RKE eyepiece used as the example of eyepiece optical design.