Sigma introduced the APO Macro 180mm f/2.8 EX DG OS HSM lens at CES/PMA. A big lens (8", 204mm in length), it's an interesting combination of fast telephoto and macro, with a fairly complex optical design as a result (19 elements in 14 groups). It's got a built-in tripod collar, OS (Sigma's version of VR), supports both DX and FX cameras, and gets to 1:1 at 18.5" (47cm), which is about a 10" working distance. Bad news is the size/weight, especially the 86mm filter threads. No pricing or availability date was announced.