Watch from minute 4.20 to hear them talk about the Sony A99II. At minute 9:20 they interview Sigma CEO once again confirms they will make FE lenses. At minute 15:00 they talk about the electronic variable ND filter for Sony. Anyway, if you find them watch it in full!
Sony A99II at BHphoto, Adorama. Amazon. Calumet Germany and WexUK.