Assertion: eyepiece's field | /r/HasAspect | apparent field of view
Facets:
value: between 35°
type: LOCATION
Source sentences:
text: Apparent and Actual Field of View: Eyepieces have an apparent field of view (typically between 35° to 100°) which when divided by the magnification (as calculated above) gives you the actual field of view (the result is in angular units, i.e. the angle on the sky that your view will include).