About: http://webisa.webdatacommons.org/64639377

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	Sigma has developed special software (SIGMA Optimization Pro) that can update the lens firmware and adjust parameters such as focus.
http://www.w3.org/ns/prov#wasQuotedFrom	amazon.com