Edward Weston used large format camera. Life was tough in 1930, could be the explanation on his subject matters, nude on dunes, mushrooms, more dunes, nude form. His work is minimalistic, simplistic, and abstract.
Wikie: http://en.wikipedia.org/wiki/Edward_Weston

1. youtube - Edward Weston

Paul Strand

Sebastiao Salgado: The Photographer as Activist

1. http://www.youtube.com/watch?v=G6fRykp6nRQ

Insect hunter INSECT