About: http://webisa.webdatacommons.org/23828740

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	A so-called front focusing method, in which the entire first lens group is moved along the optical axis to carry out a focusing operation, is a typical focusing method that is used in such a type of zoom lens system.
http://www.w3.org/ns/prov#wasQuotedFrom	freshpatents.com