Allows Canon Macro twin lite or Macro ring lite flashes to be used with lenses having a filter-thread diameter of 67 mmBenefitsIlluminate the macro world with a Macrolite Adapter ringAttach Macro Twin Lite or Macro Ring Lite to selected lensesFits lenses with filter-thread 67 mmAllows Canon Macro twin lite or Macro ring lite flashes to be used with lenses having a filter-thread diameter of 67 mmBenefitsIlluminate the macro world with a Macrolite Adapter ringAttach Macro Twin Lite or Macro Ring Lite to selected lensesFits lenses with filter-thread 67 mm