About: http://webisa.webdatacommons.org/173606903

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	This is because this lens is mostly air and aluminum, with small, thin glass elements.
http://www.w3.org/ns/prov#wasQuotedFrom	kenrockwell.com