Aperture is how much light is let in the camera. It is in the lens, it is measured in the f/stops

depth of field iswhat’s in focus, The smaller the aperture the smaller the depth of view, the larger the aperture the greater the depth of view, depth of field is what is in focus behind and in front of the main subjects

a narrow depth of field is f1.4-f 5.6 if i want everything in my shot i want to use f 22

shutter speed:1/3

aperture:22

ISO setting: 400