Abstract photography can be defined as capturing images in which the subject isn’t the most interesting element.  Albert Renger-Patzsch and Aaron Siskind photographed the ordinary to reveal their beauty.  Uta Barth reversed the typical use of the camera, shooting out of focus, and Andreas Gursky photographs the repetition of elements. The definition of abstract is existing in thought or as an idea but not having a physical or concrete existence. In my opinion, abstract photography is the way of finding a surprising angle of a normal item by the photographer. The abstract of the image would effectively demonstrate the beauty of the visual and generate a special feeling in the audience. This would make the viewers experience a more emotional reaction to the image, rather than just recognizing the subject in the image.