Multiple sources on weibo are reporting that the Tamron 17-28mm f/2.8 Di III RXD FE will be announced as soon as tomorrow. If this lens is as good as the Tamron 28-75mm f/2.8 Di III RXD FE it will be a very hot seller so make sure you grab the Tamron 17-28mm f/2.8 when it is officially announced if you are interested or you might be waiting months to get one.
Tamron 28-75mm f/2.8 Di III RXD FE: B&H Photo / Amazon / Adorama
Tamron 17-28mm f/2.8 Di III RXD FE: B&H Photo / Amazon / Adorama