Focal Planes Diorama (wip)

I'm starting to write a small book (maybe a free PDF download when it's finished) explaining the basics of photographic principles. Seems like many new photographers don't fully understand the relation of aperture and focal plane (among some other things, but I'll start with this), and most info I've seen on the net is very wordy and tech-heavy writing, so I'm going to try illustrating these concepts.