The former England international is believed to have "spent thousands" on equipment and has been learning the new skill by taking lessons.
The Daily Star quotes a source as saying: "Since David took some photography lessons, he never puts his camera down. He's bought himself how-to books and spends hours trying to perfect shots.
"He thinks he's David Bailey now he's had a few lessons. He takes pictures of everything – birds in his back garden, flowers, the sky, his kids playing football. He's spent thousands. His camera equipment is better than some professionals'."
Meanwhile, earlier this week the 37-year-old was spotted in just a pair of underpants by a bus-load of tourists in LA.