About: http://webisa.webdatacommons.org/396121984

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	By the samples they have, yes there is a fall off at 50 mm compared to the 24-105 but that is really the only focal lenght I see where this happens on that test of those 2 copies.
http://www.w3.org/ns/prov#wasQuotedFrom	fredmiranda.com