Assertion: camera lens's length | /r/HasProperty | bfl
Facets:
Source sentences:
text: Similarly, the distance from the second lens to the rear focal point of the combined system is the back focal length (BFL):
text: Back focal length (BFL) or back focal distance (BFD) (s′ F′ ) is the distance from the vertex of the last optical surface of the system (S 2 ) to the rear focal point (F′).