Ian Swimming, Hockney
This man is my hero. Besides using a Polaroid camera for a lot of his photography (major bonus points right there), he's created totally unprecedented photo collages inspired by Cubist paintings. By arranging smaller, individually photographed pictures to create one composite image, he transformed scale, perspective, and angle in ways no other photographer had before him (or has since, really). Check out the simultaneity of time and space in Ian Washing His Hair below--it reminds me so strongly of Marcel Duchamp's Nude Descending a Staircase, No. 2:
Ian Washing His Hair, Hockney
Nude Descending a Staircase, No. 2, Duchamp