Khan Academy
Khan Academy: Focal Distance
In this video [2:06] learn what happens if we change the distance between our aperture and image plane?
Khan Academy
Khan Academy: What Is a Pinhole Camera?
This video [3:08] focuses on how cameras capture images using an aperture and what a pinhole camera works.
Khan Academy
Khan Academy: Camera Lenses
Now we'll add a lens to our camera and explore the idea of an f-stop.
Khan Academy
Khan Academy: Algebra of Focus
In this video we develop a formula which tells us how big the circles of confusion are when an object is out of focus.