A few nickpicks about the usability of the DFA21 for nighttime photography: The prism housing night time illuminator LED on the K-1 can't quite illuminate the DOF scale on the DFA21 as it is positioned a bit too far away from the mount, so it is difficult to see if you are at the hyper-focal or not. Also Live view is critical for infinity focus, all my other FA limited lenses are calibrated for accurate
∞ focus: However, the DFA wanders a bit past it so night photographers keep this trait in mind!
Originally posted by house Your photo is lacking in seashell. I'm not sure pebbles will do
With photography you work with the subject matter provided. Also placing a straight line (the horizon) that close to the edge of the image reveals distortion on the DFA21*. The Horizon showed a distinct bend to it so I suggest +5 distortion correction in LR as a good place to start.
Another image from the DFA21 on the K1.
* Among lenses in the superwide class I have seen far worse.