Assertion: lens's image | /r/AtLocation | the midpoint
Facets:
value: between the lens
type: LOCATION
value: between its focal point
type: LOCATION
Source sentences:
text: For example, when a single negative lens is placed so that the image formed by the objective is located in the midpoint between the lens and its focal point, then the lens produces the image in its focal point and enlarging it two-fold, thereby acting as a 2× teleconverter.