Any advice on night shooting regards noise? in Alamy Quality Control and technical talk Posted December 20, 2018 · Edited December 20, 2018 by Steve Valentia @Nick Hatton Nick Hatton makes a very valid point about shots of buildings and other objects at night. Don't shoot them at NIGHT. Twilight gives more detail in the object and less contrast overall. For night sky shots, use the 500 rule. Divide the shortest focal length of the lens (if it's a zoom) or just the focal length (if it's a prime) by 500. This gives you the maximum shutter speed to use. Set this in manual, and the aperture to wide open (at the most, one stop down). Then change the ISO until the exposure is correct (or close enough to adjust in LR or PS.) For star trails (see above), do the same, but take multiple images. I use an intervalometer to shoot as many consecutive images as possible. I recommend shooting for at least 2 hours, if not longer. This one took 675 images. They are then "stacked" to form the light trails. I use a software called Star Stax.