The standard mounting thread on the Sunpak DX 12R ring flash head is 52mm. In order to mount the flash head on lenses with other thread sizes, the DX8R was supplied with 49mm, 55mm, and 58mm stepping rings. Used flash units may be missing one or more of these rings. The Sunpak Adapter Ring - 58mm - DX-12R allows the use of 58mm filters or accessories.
Unfotunately, we only have 1 piece(s) currently available. We have adjusted your order accordingly.