Can anyone who owns a 5DIII and the new Tamron 24-70 f/2.8 VC confirm if the 5D recognizes the Tamron as a f/2.8 lens to use the 5 dual cross type focus points? Given that even the original Canon 24-70 mk1 does not, this had me a little worried.
Mt Spokane Photography said:It could be sending the code for the new 24-70mmL, but its unlikely.
neuroanatomist said:You can tell if you test for it, with a subject (test target) that offers a contrast in only one orientation.
neuroanatomist said:I wonder what numerical value is reported for the Tamron 24-70/2.8 VC in the LensID field of the full EXIF readout?
Mt Spokane Photography said:Code 137 is the Code for a 85mm f/1.2L, so it should use the double cross. Apparently, all the Sigma and Tamrons also use this code.