Assertion: telescope's lense | /r/HasProperty | objective
Facets:
Source sentences:
text: Look for optical finders (top) that have front lenses (objectives) larger than 1 inch (25 mm).
text: The astronomical telescope makes use of two positive lenses: the objective, which forms the image of a distant object at its focal length, and the eyepiece, which acts as a simple magnifier with which to view the image formed by the objective.