About: http://webisa.webdatacommons.org/132055341

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	This doublet meniscus lens, because of being concave on the object side, is effective to reduce off-axis aberrations such as coma and astigmatism and make correction for aberrations on the high and the low magnification side.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com