What is lens aperture (f-stop)?: try it yourself

Aim

You should be able to point to the photographs and explain what changed. If the depth-of-field difference is weak, move closer to the front object and increase the distance between it and the background.

Do this step by step

1. Arrange three objects at different distances from the camera.
2. Use Aperture Priority and focus on the nearest object.
3. Choose the lowest f-number your lens allows and take a photograph.
4. Without moving the camera or objects, take another at f/8.
5. Try f/16 if available and if there is enough light, preferably with the camera supported.
6. Compare the background and also note the shutter speed the camera chose for each photograph.