This sale is for a very good condition Mamiya RB67 ProSD Rotating Back Adapter (RBA) – suitable for all of the Mamiya RB67 cameras – the Pro, ProS and ProSD – and also the RZ67 series. Please note that this RBA is the ProSD model for all 6×7, 6×8 and 645 backs – but you can only acheive 6×8 with the ProSD and ProS 6×7/6×8 camera bodies.
This RBA is in good working condition, fully tested – with obvious signs of use. The RBA has been well used with lots of missing paint – but this is only a cosmetic issue. It is slightly (but not seriously) stiff to rotate but has excellent seals. Otherwise its fine.. Ideal as a replacement for a seized or not working RBA, or if you need a 6×8 adapter and only have the 6×7 right now. Note that all RB67 ProSD bodies can handle 6×8, and also ProS bodies showing a white number 8 at the back of the camera if the RBA is removed. If your ProS body does not show the number 8, then it is a 6×7 model. Fitting a ProSD RBA to a 6×7 body does not magically convert it to a 6×8 camera!
A really usable item. Now getting harder to find.