The Vivitar DF-586 Digital Macro Ring Flash for Canon delivers the perfect shadowless direct light for macro photography. The DF-586 directly fits lenses with a 52mm filter diameter and comes with adapter rings to attach to lenses with 55mm 58mm and 62mm filter diameters. Features a (100 ISO) guide number of 18m full TTL dedication for Canon DSLRs and an exposure confirmation auto check lamp. It delivers approx. 150-200 flashes per battery charge and recycles in 2-3 seconds. The angle of illumination covers lenses 50mm and longer (35mm equivalent). Powered by standard AA batteries.