Conversation so far:
What kind of photographs did Weston take?
Weston always made contact prints.
What are contact prints?
that the print was exactly the same size as the negative.
Has he taken any photos that are famous?
CANNOTANSWER.
When did he start photography?
CANNOTANSWER.
Did he develop his own pictures?
develop one at a time in a tray.

Question: How long does that usually take?
Self-contained rewrite: How long does that take to develop pictures?