A wide-angle lens is probably preferable for night-time photography. Normally, to get a sharp shot, you need to choose a shutter speed at least equal to, or greater than, the focal length of your lens. For example, if you are using a 200 mm lens, your shutter speed should be 1/200, or faster, for a sharp shot. You will have to adjust your aperture and ISO accordingly and you might not want to work within that range (losing depth of field, increasing grain). Conversely, with a 50mm lens, you can shoot upwards of 1/50 of a second.