Assertion: telescope's eyepiece | /r/HasAspect | apparent fields of view
Facets:
value: with being very common
type: OTHER
Source sentences:
text: Eyepieces come with apparent fields of view ranging from around 30 degrees (quite narrow) to over 80 degrees (extremely wide), with 40 to 50 degrees being very common (and totally adequate for entry level eyepieces).