About: http://webisa.webdatacommons.org/76166686

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	I do not think that plastic is a bad thing in pro (LOL) lens design. ( I own a Canon 100mm Macro f/2.8L IS ($1000...made of plastic, incredible lens).
http://www.w3.org/ns/prov#wasQuotedFrom	canonrumors.com