Shootout @ 20mm: Sony FE 12-24/2.8 GM vs Sony FE 12-24/4G vs Sigma FE 14-24/2.8 DG DN Art : Death Valley Strata
See my Sony mirrorless wishlist.
This 3-way shootout at 20mm on the 60-megapixel Sony A7R IV pits the Sony FE 12-24mm f/2.8 GM against the Sony FE 12-24mm f/4G and Sigma FE 14-24mm f/2.8 DG DN Art on a distance scene that mercilessly reveals lens faults.
Includes images from f/2.8 through f/8 at up to full camera resolution, plus crops.

Sony A7R IV + Sony FE 12-24mm f/2.8 GM @ 20mm
ENV: Death Valley, altitude 4200 ft / 1280 m, 60°F / 15°C
RAW: LACA corrected, vignetting corrected, pull 0.33 stops
[low-res image for bot]