About: http://webisa.webdatacommons.org/185463254

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	Attaching the lens to an optional USB DOCK (planned to be available in 2013) plugged to your computer and using dedicated software ???SIGMA Optimization Pro???, you can update the lens firmware and adjust parameters such as focus.
http://www.w3.org/ns/prov#wasQuotedFrom	canonwatch.com