Assertion: eyepiece's length | /r/HasProperty | mm
Facets:
Source sentences:
text: (mm) ÷ Eyepiece focal length (mm)
text: Eyepiece focal length (mm)
text: Eyepiece focal length (mm)
text: Telescope focal length (mm)
text: focal length (mm)
text: Eyepiece focal length (mm)
text: Telescope focal length (mm)
text: So in choosing the best eyepiece, divide the focal length of your telescope by 200 and 240 to give you the eyepiece focal length (mm).
text: (mm) ÷ Eyepiece focal length (mm)