What is ISO Invariance?

All digital camera sensors produce digital noise. That noise is at its minimum when you use your camera’s base ISO. As you increase ISO, digital noise increases as well. With ISO invariant sensors, you end up with the same amount of noise whether you increase ISO to brighten your exposure or keep ISO the same, underexpose the image, and then brighten it later in post. If that sounds confusing, don’t worry! To really understand ISO invariance, we need to start with some core principles of how exposure works in digital photography. Read this article to learn more: https://www.photomasters.com/post/wha... I’m not an engineer, sensor designer, or technical expert on camera electronics. My understanding of ISO invariance comes from a lot of research and testing. I’ve done my best to explain it accurately, but in practical terms that anyone can understand (at the risk of oversimplifying certain details).