DSLR cameras are optimal for taking nighttime photos. Cityscapes, neon signs, twilight and after sunset options are ideal to work with. Incorporating reflecting water and light trails into your composition will create some visual interest as well. Here are a few tips on maximizing your camera settings. These settings are based on my experiences:
1.
Make sure to use a tripod when taking nighttime photos. You will be using longer exposures so I recommend utilizing a tripod to keep the camera steady. It also allows you to point the camera up.
2.
Utilize the self-timer. Any movement (including pushing the shutter release button) can cause vibration and therefore, result in a blurry image. You can also invest in a timer remote control.
3.
Make sure the auto white-balance setting is turned off your camera. Try a different white balance option to create tonal variation. Set the long exposure to off as well. I use a Nikon camera, which has both these options listed under the Menu button.
4.
I recommend a higher f/stop (f/18, f/22) and a lower ISO (200-400) setting for cityscapes. For twilight photos, I recommend a lower f/stop (f/3.5-5.6) and a higher ISO setting (800-1600). Both options yielded positive results. Remember, the right settings will depend on how much light you have to work with.
Note: Your autofocus may have trouble focusing under low light conditions, like in nighttime photography. You may have to switch to manual focus to resolve this issue.