Assertion: telescope's length | /r/UsedFor | refer to the distance
Facets:
value: between the point
type: LOCATION
value: between the primary lens/mirror
type: OTHER
value: simply
type: MANNER
Source sentences:
text: Focal length simply refers to the distance from the objective lens of the telescope to the focal point of the image you’re viewing.
text: Focal length refers to the distance between the primary lens/mirror and the point where the object is brought into focus.