How aperture affects depth of field

[Michael Fryd]

wikipedia, depth of field, section effect of lens aperture

https://en.wikipedia.org/wiki/Depth_of_field#/media/File:Depth_of_field_illustration.svg

Looks extremely similar, just saying...

I had not previously seen that wikipedia article. Thanks for the link. I like some things better about their illustration, and some things better about mine.

I do think that, as a concept, this is a good way to show how aperture affects depth of field. I suspect that if one looks around, there are many other similar illustrations out there.