About: http://webisa.webdatacommons.org/204043542

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	The 18mm lens in particular features an unusually short backfocus design, with a large-diameter rear element that protrudes behind the rear of the mount.
http://www.w3.org/ns/prov#wasQuotedFrom	dpreview.com