I was checking it out and on the BH website it says the 16mm pancake for the Sony NEX system has a 49mm filter thread. This means you're not exclusively restricted to their own wide angle adapter. Does anyone have any ideas of similar or possibly wider adapters? I've checked out the Raynox MDR-079PRO (same filter thread) but it's only 0.79, which would make the pancake a 18,96mm (not that much wider). there's a Cokin R730 52mm 0.5x which would make it an amazing 12mm, but I have my doubts about vignetting (it would also need a 49-52mm step up ring).