This Canon Speedlite Flash can be used with SLR cameras and digital SLR cameras. When combined with a compatible Canon camera and compatible lens, E-TTL II utilizes subject distance and other information that automatically modifies flash power, resulting in accurate flash exposure regardless of subject size, reflectance, or photographic composition. Canon Speedlite Flashgun Canon Flash Speedlite is great for photographers that shoot high contrast or reflective subjects, like those encountered in wedding photography. Photographers can now capture every detail from the black of tuxedos to the white of wide smiles and wedding dresses. Bounce photography, in which light is reflected off a white wall or the ceiling or a reflector, increases your range of photographic expression. As the Canon Flash Units flash head can also be tilted down by 7, light can also be used for close-up shots. Canon Flash Speedlite has high precision and stability. Ideal for telephoto and bounce flash work!