Assertion: eyepiece's length | /r/HasProperty | the shorter the eye relief
Facets:
value: the
type: DEGREE
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: If an eyepiece has a short focal length, it can focus rays of light within a shorter distance from the lens.
text: Eye relief is traditionally in proportion with 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: The general rule is that the shorter the focal length the shorter the eye relief; too short an eye relief can be uncomfortable as the eye is almost up against the lens.
text: Yes, with eyepieces having short focal lengths and very long eye reliefs (e.g. Radians, Pentax XWs, Vixen Lanthanum, Orion ED) or eyepieces with an unusual characteristic called "spherical aberration of the exit pupil" (TeleVue nagler Type 1s).