Using the Yongnuo YN-24EX TTL Macro Flash, which is compatible with Canon E-TTL and E-TTL II, evenly illuminate the closest subjects. This flash offers great control over the light's position and angle of impact on the subject thanks to its dual flash head design, which is mounted to the front of your lens. With the ability to rotate the adapter ring 50° upward and 30° downward, this system offers coverage of 90° upward and downward as well as 60° inward and 30° outward horizontally. With a guide number of 85' at ISO 100 for a single head or 79' at ISO 100 when both flash heads are in use, these heads also have outstanding power. Highlights of the Product Nikon E-TTL and E-TTL II compatibility