EXPOSURE
When you take a picture, you control how much light enters the camera. Let too much light flood in and you’ll overexpose your image, meaning it will be too bright. Don’t let enough light in, and you’ll underexpose your image, meaning it will be too dark.
This balancing act is called exposure and it’s a case of juggling your shutter speed, aperture and ISO (International Organization for Standardization). This happy trio is inseparable. Each member is different. Each has its own job. And that’s exactly why they rely on each other so much.
SHUTTER SPEED controls the length of time that light enters your camera
APERTURE controls how much light enters your camera.
ISO controls how sensitive your camera is to light.
Now you might think that exposure all seems a little sciency. On first impressions it is. But once you get to grips with a few fundamentals you’ll soon see that adjusting your shutter speed, aperture and ISO is just as much an exercise in creativity as it is in controlling light. And this term ‘correct exposure’, well, that’s just a matter of opinion.
But before we delve into the fundamentals of exposure, let’s demystify a few things about camera modes.