Get Canon 24mm at B&H Photo.
I went back and redid an older take on the Canon 24mm f/1.4L II, in part to confirm my findings in the recent comparisons against the Sigma 24mm f/1.4 DG HSM Art.
Presented with HD and UltraHD images .
Commentary on the behavior should prove quite useful if you’re shooting this lens, but also of general interest in understanding field curvature behavior—a poster child case. Also, the demonstration of aberrations is revealing.