Assertion: eyepiece's eye relief | /r/HasProperty | proportional
Facets:
value: in traditional eyepiece designs
type: OTHER
value: to focal length
type: OTHER
Source sentences:
text: In more traditional telescope eyepiece designs, eye relief is proportional to focal length: the shorter the focal length, the shorter the eye relief.
text: In traditional eyepiece designs, eye relief is proportional to focal length: the shorter the focal length, the shorter the eye relief.
text: Most traditional eyepiece designs have eye relief that is proportional to the focal length of the eyepiece.