About: http://webisa.webdatacommons.org/375741944

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	Whether he is expensive or not is open to debate but they also work well with a ???10 adapter I bought off ebay, all except my 24mm as the adapter is APS-C and the 24mm shows vignetting whilst my 28mm and anything longer doesn't.
http://www.w3.org/ns/prov#wasQuotedFrom	luminous-landscape.com