Let us Understand how ISO Works?
If we are increasing ISO basically the amount of grains or the amount of noise in your image will increase so when shooting how you should decide what ISO you should shoot at you should ask yourself three basic questions.
1. Whether you’re shooting at a very bright situation or a darker situation
For example, if you’re shooting it outdoors whether you’re shooting at daylight or after sunset or at night time or if you’re shooting indoors whether the light sources you are using are properly exposed or it’s a dark situation that is the first question you should ask if the light is very good keep the ISO as low as possible if the light is getting darker then start increasing your ISO
2. Second question one should ask yourself is basically whether you are using a tripod now if you’re using a tripod you can shoot at slower shutter speeds and as you’re shooting at slower shutter speeds you can lower your ISO and get a good image.
3. The third question you should ask yourself is whether you want to freeze the motion or whether you don’t want to freeze the motion.
So suppose you’re shooting at the dim situation and you still want to freeze the motion then you don’t have any other option you have to increase the ISO now of course increasing ISO is going to result in the degradation of your image quality but that does not mean that at situations when you don’t have the option of increasing your aperture Shutter speed or play with the light sources that you should not increase your ISO sometimes getting a good exposed image is better than shooting darker images.
So, exposing up with increased ISO should increase ISO if you don’t have any other option right so getting an image with more greens is okay but getting a darker image and then post-processing it and then making it bright will just make it worse
