Image on top shows the 24-10mm f/4.0 design
Sigma has patented the design of fours different zoom lenses:
20-80mm f/4
24-100mm f/4.0
28-70mm f/2.8
28-100mm f/4
And Canon patented those RF zooms
30-130mm f/2.8
30-1120mm f/2.8
40-150mm f/2.8
via Hi Lows Note