Assertion: eyepiece's diameter | /r/HasProperty | calculated
Facets:
value: by dividing the eyepiece
type: MANNER
Source sentences:
text: The diameter of the exit pupil is calculated by dividing the aperture of the telescope by the magnification achieved with that particular eyepiece.
text: Light emerging from an eyepiece produces a small circular image known as the exit pupil, the diameter of which is calculated by dividing the eyepiece’s focal length by the telescope’s focal ratio.