Definitions

Still life: 

A work of  art depicting mostly inanimate subject matter, typically commonplace objects which may be either natural (food, flowers, plants, rocks, or shells) or man-made (drinking glasses, books, vases, jewelry, coins, pipes, and so on) in an artificial setting. With origins in ancient times and most popular in Western art since the 17th century, still life paintings give the artist more leeway in the arrangement of design elements within a composition than do paintings of other types of subjects such as landscape or portraiture. (From Wikipedia.com)

Fine Art photography: 

There are no universally-accepted definitions (From Wikipedia.com)

• A picture that is produced for sale or display rather than one that is produced in response to a commercial commission
  
• The production of images to fulfill the creative vision of a photographer
  
• Also called "decor photography," this involves selling large photos that can be used as wall art.