As stated by the modern and contemporary art website:
The conceptual idea of Modernist photography is “look at this,” look at how photography interprets the world: through light, lens, glass, film, paper, brain and eye. ...... clean lines, repetition of form, strange viewpoints where the photographers observation of the subject is as important as the subject itself. Look at how I, and the camera, see the world: that is all there is, the indexical relation to the word of truth.
Ian G Kahler