Another grey day.
Different park, different Crocus. Same lens and now with the close up lens 6T but little effect on a 20mm of course. The 20/2.8 AF is a fine lens, central sharpness is great, a bit soft corners wide open, little distortion, some field curvature, but the real advantage with the 20/2.8 is the auto-focus and small and portable size. And the Df seems to like the lens
Cut out the vignetting caused by the 6T.