The Nissin MF18 Adapter Ring enables the attachment of the MF18's Macro Ring Flash to the front of a lens with a 49mm, 52mm, 55mm, 58mm, 62mm, 67mm, 72mm, 77mm, or 82mm filter thread.
NOTE: The Nissin MF18 Macro Ring Flash is sold with 6 adapter rings.
The Nissin MF18 for Canon and Nikon includes 6 anodized aluminum adapter rings for the following size lenses: 52/58/62/67/72/77mm.
The Nissin MF18 for Sony includes 6 anodized aluminum adapter rings for the following size lenses: 49/55/62/67/72/77mm.