Aperture is the adjustable lens opening that controls the amount of light allowed into the camera. the smaller the aperture the greater the depth of field. Whereas, a wide aperture gives you a shallow depth of field which leads to only the foreground is sharp. A narrow aperture gives you a deep depth of field which means everything is sharp.
depth of field
depth of field is the distance between the nearest and further objects in a scene that appear to be sharp/ clear in the image.
The top image is taken with a smaller aperture meaning that the background of the image is blurred. Whereas the image on the bottom is taken with a larger aperture meaning that it is allowing more light in.
STUDIO SHOOT
this image was taken with a white background which contrasts against the beige two toned lower background. this was taken with a wide aperture as everything in the image is in focus.
This photo was taken with a slightly bigger aperture than the photo below as has a smaller depth of field due to only the rocks and reflection being in focus and the background being blurred. Furthermore, this photo was taken on an infinity screen which gives the illusion that there is an infinite white background.
this was taken with a small aperture meaning that is has a large/ long depth of field. you can tell this as everything in the photo is in focus.
