This is not a technical review but more of an image review using these 2 lenses and some of my thoughts on the two on the Sony Alpha series mirrorless cameras. These were shot on different mornings so had different lighting to contend with.
To start off with both of these lenses are actually very sharp and perform great. The sigma is a bit wider at 20mm but it is a rounded front element so have to have specialized filters for it you want any ND or Polarizing filters and the lens is bulky and heavy. The Sony on the other hand is light and though it’s not as wide at 24mm it still is a great wide angle lens and one of my go to focal lengths most of the time these days. The Sony also has a standard screw mount filter system which can use any number of filtering systems.
Enough talk how about a few images. Again, different days and I shot at different settings which is why I am saying it’s not a technical review but shooting in different scenes and they both preformed great.