Within this photo shoot, I messed around with the exposure settings on my camera to see which number displayed the piece of paper most effectively. Within Photographs, exposure determines how light or dark an image will appear when it had been captured by the camera and viewed. This can be determined through aperture, ISO and shutter speed, which can be located on your camera and seen in the exposure triangle below. However you need a combination of all three to make the perfect exposure. If too little light is let into the picture, it will become too dark and underexposed, and the same with letting too much light into it as the image will become too bright and overexposed.