Mamiya RB67 Unidentifiable Accessories

Hello guys,

I recently bought a Mamiya RB67 and it came with a bunch of accessories that I have absolutely no idea what they are there for. The previous owner of the camera already passed away so I could not ask him, therefore I thought that this forum might be my best shot at finding out what the function of the accessories are.

I attached some pictures and would appreciate any insights.

All the best,
Valentin

No idea about the rest but the one marked "Tele" is an adapter for the front of a Gossen meter to give a narrower angle of metering.

Ronnie

The mount adapter somehow adapts a polarizer to a Mamiya lens.
The 77mm adapter likely on its rear has a male 77mm thread to mount onto a filter thread. The plate likely takes up a holder for rectangular/square filters, maybe it even forms the holder itself.
The coloured sheets are light filters, to be helt by such holder.
The two black textile parts likely are just dividers from a photo-bag/case.
The Gossen thing better is not called adapter, but "Tele" attachment. It can be mounted at several Gossen meters (all that take attachments).

I am clueless on the forceps.

The spring clamps are common cheap generic light clamps for holding floodlamps or other utility lamps. Yours are incomplete. The ball end fits into small a clamp to grasp the reflector and lamp. The large clamp grasps whatever is handy to position the lamps for indoor photography.

You can see a picture of the complete clamp assembly in the photos here:

HDX 8-1/2 in. 150-Watt Aluminum Incandescent Light Fixture with Clamp-277894 - The Home Depot

None of those are RB accessories. The AN701 adapter is for Mamiya 7 bayonet mount lenses.

The black square plastic thing marked "Ambico" is a front cap for the Ambico square filter system, which is a similar idea to the more popular Cokin square filter system. I can't read the logo on the colored square filters and the round polarizer, but they might also be Ambico filters. These used a round plastic ring that screwed into the filter threads, and a plastic holder that snapped onto the ring and had a few slots to accept filters and the cap.

I don't know if they are the same size as the Cokin filters. When I was a student in the 1980s I bought a couple of these Ambico filters to be able to use a few filters on different lenses (on a student budget). The system didn't ever become as widespread as Cokin.