Final answer:
Alfred Stieglitz was the artist whose photographs were produced with no technical manipulation. He played a significant role in establishing photography as an art form and his work focused on capturing everyday scenes in a realistic manner.
Step-by-step explanation:
Out of the given options, the artist whose photographs were almost always produced with no technical manipulation is Alfred Stieglitz. Stieglitz was a prominent figure in establishing photography as an art form and his work focused on capturing everyday scenes in a realistic manner. He believed in the purity of photography and sought to showcase its potential for originality. His photographs were known for their low contrast and warm-toned images.