I am looking for a new lens to purchase, however, can anyone tell me the differences between:
Canon EF 75-300 f/4-5.6 III
Sigma 70-300m f/4-5.6 DL Macro Super II
Sigma 70-300m f/4-5.6 APO DG Macro
Tamron 70-300mm f/4-5.6 Di LD Macro
Does that mean the canon 70-300 does not support macro ability, and also what is the difference between the sigma DL and APO?