About: http://webisa.webdatacommons.org/19261830

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	Collimating optics such as a parabolic mirror, lenses, prisms or other optical elements may be employed at anamorphic correction optics (77 or 78) for compensating projection for off-axis keystoning in one or more axis.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com