ISO controls how sensitive your camera sensor is to light. Keep it between 50 and 100 for clean shots, but you can push to 1,000 or even 2,500 in dark conditions. Higher ISO means more grain and noise.
Chapters
The last thing that we are going to talk about is the ISO, which is basically the amount of signal being sent to the sensor, and so it becomes more sensitive to light. The only thing with this, I would suggest always keep it as low as you can, and if you have to go higher, you, you can go higher, but it's going to look grainier and grainier as you go up the ladder. ISO, you want to keep your ISO at around 50 to 100 ISO if you can help it. There are times where I'm moving it between 100 and 1000, sometimes even 2500 to 3000 if it's in a darker space. But just something to note, the lower the ISO, the cleaner the image, and the more you shoot that ISO up, the more grain you introduce, the more noise you introduce into the image.