Depth of field refers to the range of distance that appears acceptably sharp. Depth of field varies depending on aperture and focusing difference.
Depth of field allows us to choose what is going to be in focus and what isn’t in our photographs.
Below are two photos I took with two different apertures. The top photo, taken with AF 3.5 shows the image around the sides becoming blurred. In the bottom image, taken with AF 22, everything is sharp.
