From Super 16 to IMAX, here are the major differences in sensor sizes that you need to know and how to use them.The size of a camera’s sensor determines how much light it can gather to create an image, at least in part. While it makes sense that a bigger sensor can gain more information than a smaller one, producing better images, there are major perks to a smaller sensor.
Source: Forget What You’ve Heard—Sensor Size Does Matter, and This Is Why