There was a question from a previous thread that I meant to answer, but it was locked down before I had the chance to do so.

Nature Photo: “Frankly, I skipped over most of the thread, so maybe it was mentioned already... My question is: where can I learn about BTZS (website, book)?
Thanks.

There is a site dedicated to BTZ moderated by Phil Davis himself . See www.btzs.org.

To learn BTZS pick up a copy of Phil Davis’ Beyond the Zone System. Or, for workshop information contact Fred Newman at the View Camera Store.