Assertion: plössl eyepiece | /r/HasProperty | a type of eyepiece
Facets:
Source sentences:
text: 50 degrees: the field of view provided by a Plössl eyepiece, a type of eyepiece that has become quite popular in recent years; note that some eyepieces of this type have been made to provide an even larger field of view, whether just slightly larger at 52 degrees, or wider still;