Mamiya RB67 Pro SD Revolving Back Adapter

The genuine Mamiya rotating adapter that gives the RB67 its name — mounts between the body and film back, letting you flip from landscape to portrait orientation without moving the camera. This is the later Pro SD version with the lock slider. Tested, rotating smoothly, seals intact.

The “RB” in RB67 stands for Revolving Back, and this is the part that makes it happen. The revolving back adapter mounts between the camera body and your film back, letting you rotate the entire back 90 degrees — switching between horizontal and vertical framing without ever moving the camera off the tripod. For studio, portrait, and product shooters, it’s the feature that made the RB67 the workhorse of working photographers for decades.

This is the Pro SD version — the final and most refined iteration, identifiable by the LOCK slider on the side. It’s the adapter to have: fully compatible with Pro SD backs while also accepting earlier Pro S and Pro backs, making it the most flexible option in the RB system.

These adapters take real abuse over a working life — they’re the connective tissue of the whole camera — so a clean, smooth-rotating example with intact light seals is worth seeking out. Whether you’re replacing a rough or light-leaking adapter on your own RB, building out a second body, or completing a kit you bought as parts, this is one of those unglamorous pieces that has to be right.

Inspected and tested by our team at Photodom: rotation is smooth, detents click positively in both orientations, and the light seal foam is checked.

Features:
Genuine Mamiya RB67 revolving back adapter, Pro SD version. Rotates film backs 90° between landscape and portrait without moving the camera. Pro SD lock slider. Compatible with RB67 Pro SD, Pro S, and Pro bodies and backs. All-mechanical operation — no batteries, nothing to fail electronically.

Condition:
Used – Tested and fully functional. Rotation smooth with positive detents in both orientations. Light seal foam intact. Shows normal cosmetic wear consistent with studio use.

Included Items:
Mamiya RB67 Pro SD revolving back adapter. (Remove the inventory sticker before photographing for the listing.)

Why Buy From Photodom:
Every part we sell is inspected in our Brooklyn lab — on RB67 pieces that means checking rotation, detents, and the light seals that actually determine whether your film comes back clean. Shooting an RB? Bring it by 1717 Broadway and we’ll fit-check it on your body before you buy.