DSLR Tutorial: How to shoot in Low Light (at night) & how to reduce noise!
https://www.youtube.com/watch?v=AZ9aIB57-Nw

  1. Never go higher than ISO 1600 or the image gets noisy.
  2. Keep you shutter speed between1/30s and 1/50s (lights start flickering with higher speed).
  3. Aperture should be F/1.2 to F/5.6.
  4. Change the contrast of your camera down.