Shooting at night isn’t easy. I had a really hard time getting the focus right on most attempts, and as I fumbled around in the dark trying to deal with technical and compositional challenges, I experimented with a variety of focal lengths, aperture sizes, levels of iso, and the length of each exposure. One of the things I found most exciting was how the camera would, over the length of the exposure, gather much more light than my eye could see. I would stand for 30 seconds or so in total darkness holding the camera shutter open, but when I would get a preview of the image on the back of the LCD, I could “see” the scene quite clearly. Depending on the focal length chosen, an exposure of more than 25 seconds would likely result in bright stars exhibiting “trails” rather than pin-point beacons of light. I’m sure you have seen the effect of very long exposures where the earth rotates while the shutter is open, rendering long and interesting trails of light in the sky… that wasn’t what I was going for here, but it is something I am very interested in trying out sometime soon.