Peter Henry Emerson's Personal Photography Concept

Peter Hurley Emerson's main points in his book Naturalistic Photography are:

Photography is an independent art and a combination of art and science.

Photography can be realized by directly recording natural themes in the natural environment through framing, composition, lighting and selective focusing.

Focus vision theory, that is, the middle part of human vision is clear, while the edge part is fuzzy. In order to realize the visual reproduction of human eyes, the focus does not need to be completely accurate, and the focus can be blurred and changed appropriately without destroying the structure and image of the subject.