Assertion: lens's image | /r/HasProperty | produced at the focus
Facets:
Source sentences:
text: In the case of a camera one would quote the plate scale, which compares the apparent (angular) size of a distant object to the size of the real image produced at the focus.
text: In the case of a camera one would quote the plate scale, which compares the apparent (angular) size of a distant object to the size of the real image produced at the focus.