Anna: I played around with some long exposure shots again tonight. Actually, I played around with both shutter and aperture, but of the ones I liked enough to post here, they all turned out to be 30 second exposures. I'd try longer, but I haven't figured out how to do that yet. I think I should be able to do it with the remote, but haven't looked it up yet. All in good time.
All of these photos are straight out of the camera. I only re-sized them by 50% and converted them from RAW to jpg files. You can view the larger images here.
The first couple of shots were taken at a pedestrian overpass, directly above a major thoroughfare.
I took quite a few shots from this one spot, first changing just the shutter speed at F29, then going with a shutter speed of 30 seconds and changing the aperture. This one is at F/20 and is my favourite of the bunch.
Taken from the same area of the bridge, on the other side. This one is at F/22.
The next three are from the same spot, changing only the aperture. There are slight differences in the positioning, though, as I had to move the camera so I could see the screen while changing the settings.