Typically, the authorship of a work of art is indicated with the genitive case: «роман Толстого». The subject of a photograph is also indicated with the genitive, however: «фотография Толстого». You can probably see where I'm going with this:
How do I indicate the photographer who took a photo, distinguishing it from a photo of that photographer? I'm inclined to insert the preposition «у» (e.g., «фото у Дмитрия Зверева»), but I'm not at all confident in that idea.