carstenw wrote:
EF-S and EF lenses have the same register distance.
EF-S lenses aren\'t compatible with full frame EF mounts. You have to modify an EF-S lens to fit on to a full frame EF mount.
Nevertheless, the narrow center opening seems to be in line with EF-S lenses. Also, note that side facing the lens has both the circle and square mount markers for EF and EF-S lenses, respectively, but the adapter itself only seems to have the spherical mount marker (EF).
Mar 18, 2011 at 01:32 PM
Previous versions of kakomu's message #9415120 « Canon patent for lens adapter »
