About: http://webisa.webdatacommons.org/132677318

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	That would lead one to believe that Sigma should be able to rechip problem lenses to make them work properly.I have a number of old Sigmas that will not work well with my d7000 using phase detect AF and Live View is a no go.
http://www.w3.org/ns/prov#wasQuotedFrom	dpreview.com