8-Bit vs. 16-Bit | Bit Depth | What is Tonal Range?




The Art of Retouching - Adobe Photoshop & Lightroom Retouching Tutorials show

Summary: What is the difference between editing images in 8-bit or 16-bit? While it should be obvious that 16-bit color is significantly better than 8-bit color. After all, 8-bit is only 16.7 million colors when comparing that to 16-bit which is 2.81 Trillion Colors. However, it just doesn't seem that way to the naked eye. This is because humans can only see less than 10 million colors anyway. Since 8-bit already exceeds 16 million colors, why in the world do we need to work in a bit depth that moves us into trillions of colors? Visually, they both look the same, why use the higher resolution?