Sony FE 12-24mm f/2.8 GM Distortion Examples, Uncorrected vs Distortion Correction
See my Sony mirrorless wishlist.
This page looks at the outstandingly low distortion of the Sony FE 12-24mm f/2.8 GM at 12mm, 17mm, 21mm.
Sony FE 12-24mm f/2.8 GM Distortion
Includes images at up to full camera resolution, plus crops and with and without distortion correction for comparison. Also includes a discussion of the impact of distortion correction.

f9 @ 1.6 sec EFC shutter, ISO 100; 2020-09-29 17:14:24
Sony A7R IV + Sony FE 12-24mm f/2.8 GM @ 21mm
ENV: Alpine Creek, altitude 650 ft / 198 m, 78°F / 25°C
RAW: LACA corrected, +20 Whites, Color Luminance {Greens +30, Yellows +10}, +15 Clarity, diffraction mitigating sharpening
Sony A7R IV + Sony FE 12-24mm f/2.8 GM @ 21mm
ENV: Alpine Creek, altitude 650 ft / 198 m, 78°F / 25°C
RAW: LACA corrected, +20 Whites, Color Luminance {Greens +30, Yellows +10}, +15 Clarity, diffraction mitigating sharpening
[low-res image for bot]