Vivitar VIV-DF-586-CAN Digital Macro Ring Flash for Canon Full TTL dedicated macro ring flash for Canon digital SLRs Angle of Illumination: 50mm and above (35mm equivalent) IGBT (Insulated Gate Dipolar Transistor) and Series Circuitry Auto Check Indicator Includes rings to fit lenses 52, 55, 58, 62, & 67mm