The Enthusiast's Guide to Night and Low-Light Photography, 1st Edition

4. USE THE ISO TO YOUR ADVANTAGE

THE ISO SETTING determines how sensitive the sensor in the camera acts. Since the actual sensitivity of the sensor doesn’t change, the ISO really adjusts how the information from the sensor is amplified. The more amplification, the less light is needed. The downside to this is that when you raise the ISO there is more digital noise introduced into the image.

The good news for photographers who shoot at night or in low light is that camera manufacturers have made advances in reducing the amount of noise introduced into images by the use of high ISOs. The Nikon D750 allows me to use ISO settings that are much higher ...