When it comes to photography, ISO is one of the most important settings to understand. ISO stands for ?International Organization for Standardization? and is a numeric scale that represents how sensitive your camera?s sensor is to light. The lower the ISO number, the less sensitive it is to light and vice versa.
Most digital cameras have an ISO range of 100-1600, with some going as low as 50 or as high as 3200. The reason why photographers need to know about ISO is because it directly affects the exposure of an image.
If the ISO is too low, the image will be underexposed and too dark. If the ISO is too high, the image will be overexposed and too bright. Finding the perfect ISO can be a bit of trial and error, but once you get the hang of it, It’s an important tool for creating beautiful images.