Two trusted and reliable online sites define photography differently and yet both definitions convey almost the same meaning.
Wikipedia defines fine art photography as "a high-quality archival photographic prints of pictures that are created to fulfil the creative vision of an individual professional." The site refers to fine art photography as synonymous to art photography.
Merriam-Webster broadly defines fine art photography as "art concerned primarily with the creation of beautiful objects". Based on this broad definition, anything can be the subject of fine art photography for as long as the subject is beautiful. But then, beauty is in the eyes of the beholder. So that makes fine art photography as subjective in nature.
Taking these two definitions into account, both conveys one thing - fine art photography is about beauty. Wikipedia's "high-quality photographic prints of pictures" can be construed as what Merriam-Webster referred to as "beautiful objects."
Some reference books define fine art photography as a picture that is produced for sale or display and the production of images to fulfil the creative vision of a photographer. This is similar to Wikipedia's definition of fine art photography.
Other websites defined fine art photography as a movement in England and the United States which promoted various aesthetic approaches while a simpler definition was presented as fine art photography being "a subset of fine art that is created with a camera."