Has anyone heard anything about Tamron producing a wider angle lens than their 15-30mm f2.8 i.e. something like 10 or 12 or 14-24mm f2.8 so the current 6mm cross over of the 15-30mm f2.8 to their 24-70mm f2.8 is eliminated? The 15-30mm is about 3 years old now and in the latest format i.e. all black and no gold trim so it's hard to tell if there's any thoughts about updating it.