Sigma 70-300mm f/4-5.6 DG APO Macro Telephoto Zoom Lens for Canon SLR Cameras
This is what I see, but I can't for the life of me figure out what APO means. Also, Whats the difference between that one and this one....
Sigma 70-300mm f/4-5.6 DG Macro Telephoto Zoom Lens for Canon SLR Cameras
Both on amazon, but the one without the APO in it is 70 dollars less.
Help??
Jason