Assertion: eyepiece's field | /r/HasProperty | 0.64°
Facets:
Source sentences:
text: The resulting true field of view is 0.64°, allowing an object such as the Orion nebula, which appears elliptical with an angular diameter of 65 × 60 arcminutes, to be viewable through the telescope in its entirety, where the whole of the nebula is within the observable world.