Assertion: eyepiece's field | /r/CapableOf | be provided by a plössl eyepiece
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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;