Cold Shoe Adapter for Mamiya RB67 (Left Side Mount)

This is a custom cold shoe adapter designed to fit the left-side mount of the Mamiya RB67, utilizing the same screw holes typically used for the camera strap lugs.

The adapter allows you to attach light accessories, such as a light meter, directly to the side of the camera. It fits snugly against the body and stays in place thanks to a slightly tighter (0.1 mm) tolerance against the camera surface. The design requires no modification to the camera and can be easily removed by hand.

Please note: this adapter is intended for the left side of the camera only.
If you mount it on the right side, it will block the shutter release lever, which needs to be pulled forward to open the lens. I originally designed a version for the right side, but quickly realized the lever couldn’t be operated — so this version is made specifically for the left side.

⚙ Printing details:

Print time: ~42 minutes on an Ender-3 Neo

Recommended orientation: standing upright with the hole facing downward (for easier support removal)

Layer height: 0.2 mm

Supports: Yes

Material: PLA or PETG

⚠ Important information:
I do not recommend mounting anything heavy on this adapter. It’s intended for light accessories only — use at your own risk.
Since this mount normally holds the camera strap, the screws themselves are quite robust and should not break. The Mamiya RB67 is a heavy camera, so the 3D-printed adapter would likely fail before the camera itself does.

I printed mine in PLA, but you can use PETG for a more durable result. Personally, I’m using it to hold a light meter.