Sigma 20-40mm f2.8

[S_Leeper]

This is an actual size crop straight from the camera: std, std, off
f3.3 1/60 approx focal len 30mm.

[S_Leeper]

This is another actual size crop at: std, std, off
f4.8 1/60 focal len appox 30mm.

[S_Leeper]

To provide some sense of the distortion the below has the full frame of the above extracts for close range 5-10 feet distortion.

The castle is the uncropped, but downsampled full frame, for more distant distortion. The actual size crop shows details rendered from a distance.
Focal len approx 20mm, 1/350, f8.0, std, std, off.

All three shots were shot in normal mode, white balance auto, full resolution...