Sigma has adapted its outstanding Sigma DG HSM Art lens line to Sony mirrorless by extending the rear of the lens barrel. Since it was designed for a DSLR, the optical design is ray angle friendly for digital sensors.
This near-to-far scene is an informative demonstration of field curvature and depth of field with the Sigma FE 14mm f/1.8 DG HSM Art. It should be helpful for photographers looking to capture maximum sharpness, that is, by understanding focus placement and taking into account field curvature.
Images at sizes up to full camera resolution.