About: http://webisa.webdatacommons.org/13994114

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The invention relates particularly to a focusing mechanism for adjusting a focusable objective lens assembly in response to focal distances determined by a range finding device functioning on the principle of triangulation.
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com