Sigma 24mm F3.5 DG | Contemporary

Reviewers find the centre sharp from f/3.5 and the corners good by f/5.6 to f/8, which suits a lens that will mostly be used stopped down. The near-1:2 close focus is consistently called its best trick. Uncorrected files show clear barrel distortion and vignetting, so it depends on the in-camera profiles.

The main reservation is the slow f/3.5 aperture, which limits low-light use and background blur at normal distances. The 7-blade aperture and modest speed give plain bokeh, but the build is praised as far above what its price would suggest.

Owners use it as a body-cap-sized wide for travel and street shooting on A7C and A7-series bodies, and many say it rarely leaves the camera. The metal rings, hood and magnetic cap get plenty of praise, as does the close-focus ability.

Complaints include visible distortion when profiles are off, slow light gathering indoors, and focus breathing that makes it less ideal for video. Some find the magnetic cap easy to lose.