Assertion: eyepiece's diameter | /r/HasProperty | equal
Facets:
value: to the telescope clear aperture
type: OTHER
value: approximately
type: DEGREE
Source sentences:
text: The magnifying power should be chosen so that the diameter of the exit pupil is approximately equal to the diameter of the pupil of the eye.
text: The diameter of the beam of light coming out of an eyepiece -- which is called the "exit pupil" -- is equal to the telescope clear aperture divided by the magnification.