This document discusses depth of field and how it allows photographers to control the focus in photos. It explains that opening the lens wider results in slower shutter speeds that can create motion blur, while closing the lens takes photos faster for clearer images. It also addresses how aperture and ISO work together to properly control the light in a photo and avoid overexposure.

1. This is an example of depth of field. It shows how you can change the focus on the
camera to your choice.

2. This controls how fast the photo is taken. You control
how open or closed you want the lens to be. The
more open the lens is the slower the shutter speed
is, giving the photo the motion blur. Where as when
the lens is more closed it will take the photo faster
resulting in a more clear, detailed photograph.

3. This is used to control how much light there is on
the picture. Too much light on a photo makes it
overexposed like the ones above. To help the
aperture you must control the ISO depending on
whether it needs to be higher or lower.