Sigma has another winner on its hands with the 24mm F1.4 DG HSM Art. It delivers crisp images, even at its widest apertures, and it's certainly capable of capturing images with a shallow depth of field when shooting at f/1.4, especially at close focus distances.
Sharp from edge to edge; Minimal distortion; Wide aperture; 9.8-inch close focus; Full-frame coverage; Available for multiple camera systems
Noticeable fall-off at f/1.4 and f/2; May require focus adjustment via USB Dock; Large and heavy; Omits stabilization