02-21-2017, 02:56 PM
Quote:The Nikon extends at the wide end - the Sigma at the long end. This does make a difference.You are right in that that is a difference. However, the old Canon EF 24-70mm f2.8 L USM also extends at the wide end, and does not show the variable MFD (as far as I know). So the correlation still is not that solid?