Image on top shows the Canon 24-105mm f/2.8 lens (the Sigma will be a tiny bit smaller and lighter)
In early September, Sigma will announce its new 28-105mm f/2.8 lens for Sony E and Leica L cameras. I am told that the weight of the lens is less than 1 kg. This is considerably less than Canon’s 24-105 mm f/2.8, which weighs 1.3 kg. Filter size is 82mm.
I think this could become a very popular lens!