Yes wide open, 20 second exposure, SR was turned off but camera is mounted on a equatorial mount.
I haven't really had a chance to try the lens in the daylight, not at infinite focus anyway. But I have tried it on the moon before with the same results. The focus point just doesn't seem to move far enough to focus on long distance objects. I know its not the mount as I've tried it with other cameras and my telescope and have gotten much better results.
Here's a (not very good) shot of the Pleiades which you can see is relatively sharp at infinity. Same mount, different camera: