It has 2 modes! Under the star tracker mode(by default), it can support all cameras. Under the passive timelapse mode, it only works directly with Nikon, Canon, and Sony cameras through the hot-shoe port. Under the passive timelapse mode, For non-Nikon, non-Canon, non-Sony cameras (Fujifilm, Panasonic, Olympus, Pentax, etc), you just connect the intervalometer.