This is the last boss of your camera’s manual mode. It will give you great control over your low light shots but can also, pretty much ruin your images if not dealt with understanding.
ISO is the sensitivity of your camera sensor towards the light. Higher ISO will result in higher sensitivity towards light and low ISO, low sensitivity towards the light.
ISO is helpful when shooting in low light conditions. The thing you need to keep in mind while experimenting with the ISO is that the higher sensitivity of the sensor will bring noise into your images and will affect the detailing of your image.
High ISO = Noisey image with loss of detail
Noise is nothing but the grainy texture in your image because of the higher sensitivity of your camera sensor.
Different camera models deal with this issue of sensor noise differently. Some expensive cameras have very good low-light performance i.e. they can go to higher ISO mark without any significant noise.
It’s best to set ISO after you have set your shutter speed and Aperture according to the demands of your shot and it is always recommended, not to exceed the ISO from a particular mark (normally ISO800 should be the last option for any cropped sensor cameras). But there are instances where you are out of options and have to increase the ISO, in those cases, you can always use post-production and edit the shots using adobe lightroom and adobe photoshop.
Hope you enjoyed this. But remember, only you can teach yourself with practice. So get out and shoot something. Don’t forget to share with me and comment below if this has been helpful.