Assertion: eyepiece | /r/CapableOf | range to even 120°
Facets:
value: from 43° for planetary eyepieces
type: OTHER
Source sentences:
text: It can range from 43° for planetary eyepieces to 68°, 82°, and even 120° for wide-field eyepieces Exit Pupil , while not strictly a specification of an eyepiece, is simply the focal length of the eyepiece divided by the focal ratio of the telescope; the exit pupil affects the perceived brightness of the image