Originally posted by song_hm Phew! Been searching hig and low, but info for this lens is hard to come by from google, nothing on ebay. Frustrating :-(
In a nutshell...From what I understand is there are/were 3 versions of the Sigma 70-300 APO Super Macro. They are all pretty much the same optically except the coatings on the lens supposedly got better with each version....the most recent being the Sigma 70-300 APO DG Macro. I had the APO Macro Super II in Canon mount, which looks identical to Gene's lens except the newer one had a red ring instead of a gold ring.
So you had the Sigma 70-300 APO Macro Super (the one Gene's selling here), replaced by the 70-300 APO Macro Super II, which was replaced by the newest version which is the APO Macro DG (supposed to have better coatings to reduce ghosting on digital sensors)
To add confusion...Sigma offered a similar, cheaper lens usually designated 'DL'...which is pretty much junk from what I've heard.