Is this the only photograph of an adult Vincent Van Gogh? Art historian claims to have uncovered an image of the camera-shy Dutch master

Is this the only photograph of an adult Vincent Van Gogh? Art historian claims to have uncovered an image of the camera-shy Dutch master  Antonio De Robertis, a leading authority on the artist, claims to have identified the Dutch painter among a group of 34 men who posed for the image at the Académie Julian in Paris in 1888.