About: http://webisa.webdatacommons.org/29284557

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 definitely remember reading it somewhere, so it might be there in some manuals, but if there was a good reason for turning the camera off, it would be in every manual, both for cameras and lenses, and it would be hard to miss.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com