Sony FE 20mm F1.8 G

Reviewers rate it among the sharpest 20mm lenses for any mirrorless system, with good corner performance from f/1.8 and very good by f/2.8. Distortion and lateral colour are low, flare resistance is good, and coma is mild enough for night-sky work wide open.

Criticisms are minor: some vignetting at f/1.8, unremarkable sun stars, and focus breathing that was more noticeable than Sony's newer designs. It is consistently called better value than most rivals in its class.

Owners use it for landscapes, astro, interiors, travel and vlogging, and many say it replaced a 16-35mm zoom for most of their wide work. The combination of f/1.8, filter threads and 373g is what sells it.

Complaints are few: the hood is large, a handful of owners mention slight decentering on early samples, and some find 20mm too wide for everyday street use.