Conversation so far:
What was Edward Weston's most famous photograph?
CANNOTANSWER.
How long did each photo take to produce?
CANNOTANSWER.
Are there any other interesting aspects about this article?
Weston was a prolific writer.
His Daybooks were published in two volumes totaling more than 500 pages in the first edition.
What were the main subjects of his writing?
Among Weston's most important early writings are those that provide insights into his development of the concept of previsualization.

Question: Oh, so his various photography techniques?
Self-contained rewrite: What are Edward Weston's various photography techniques?