Assertion: eyepiece | /r/HasProperty | divided by focal ratio of the telescope
Facets:
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
text: , 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 Barrel Size.