Dad likes photography. What should I give him?

Just send the camera. Everyone who really likes photography has more or less pursuit for the lens. Lens is also the most indispensable and important equipment in photography. So know your father's demand for lenses and buy him one, and the effect will be the best.

If there is no shortage of lenses, send the fuselage, and send the fuselage better than 5D, such as 5D2, 6D and 5D3. The effect is just as good.

The rest can choose tripod (like taking scenery) and flash (like taking portraits).

Generally speaking, it is to buy gifts as needed to fill gaps or enhance existing equipment. For reference.