Assertion: eyepiece | /r/HasProperty | available
Facets:
value: a few decades ago
type: TEMPORAL
value: to the amateur
type: TRANSITIVE-OBJECT
Source sentences:
text: A few decades ago, that such eyepieces would be available to the amateur would be undreamed-of.
text: Eyepieces are available having apparent field of view (how large the illuminated view seems) between about 40 and 100 degrees.