Sony FE 20mm f/1.8 G: Distortion Corrected vs Uncorrected
Keep capture crispness — low distortion means no sharpness-robbing distortion correction.
The Zeiss Loxia 21mm f/2.8 has much lower distortion and the Sony FE 20mm f/1.8G both have much lower distortion.
In light of the major distortion of the Sony FE 20-70mm f/4 G, I added a page showing how low distortion is with the Sony FE 20mm f/1.8 G:
Distortion for Sony FE 20mm f/1.8 G
Includes corrected vs uncorrected images.