This sale is for a really excellent condition 77mm adapter ring to fit the Mamiya RB67/ RZ67 bellows lens hood G-2. This allows you to fit your G-2 hood to most of the Mamiya RB67 / RZ67 standard and telephoto lenses using a 77mm filter ring – or for a host of other lenses as well. This ring is NOT suitable for the G-3 hood.
This ring has normal very minor signs of use. Try finding another one!