The Canon 470EX-AI flash helps you create the right lighting for portrait photos. In the AI Bounce Semi Auto mode, the flash will remember what position it's in. The Full Auto function determines the lighting. The camera sends a flash forwards and upwards. On the basis of that data, the strength and reflection angle of the flash are determined. The Canon 470EX-AI flash has a range of 47 meters. This allows you to light both subjects close to you and those at a large distance. The range is 24 to 105 millimeters, which means the flash zooms along with your lens. You can extend this range to 14mm. That way, the flash won't be too harsh for someone who's two meters away.