The DF-586 Dedicated Macro Ring Flash for Canon delivers the "shadowless" direct light ideal for macro photography, and it's dedicated to Canon DSLR cameras. It comes with rings to attach to lenses with 52, 55, 58 and 62mm front threads, it has a (100 ISO) guide number of 18m, full I-TTL dedication for Canon DSLRs, and an exposure confirmation auto check lamp. It delivers app. 150-200 flashes on a battery charge and recycles in 2-3 seconds. The angle of illumination covers lenses 50mm and longer (35mm equivalent) and it's powered by easily found AA alkaline, NiCAd, or Ni-MH batteries. Batteries are not included.