Are synchro flash and screw-lock PC terminal the same thing?

[Alan R Estes]

Looking for a way to connect my old flash to my RB and can find screw-lock PC terminal cables advertised, but the RB manual says synchro flash.

Two names for the same thing, or no?

Thanx, Alan

 

[MattKing]

No.
The synchro flash terminal on RB lenses is actually a plain PC (Pronto- Compur) terminal. A screw-lock PC terminal cable uses a PC connector to establish an electrical connection, and a screw-lock thread to physically reinforce and maintain that connection.
Some screw-lock cables might be able to connect without engaging the threads.
What type of flash is it?

 

[Alan R Estes]

Sunpak Auto 433D, which means that I will also have to use a shoe adapter.

 

[narsuitus]

The Sunpak Auto 433D Thyristor flash unit has a shoe mount dedicated for different cameras. If your 433D does not have a PC cord connection but only has a hotshoe connection, you may have to get a PC-male to hotshoe adapter so your flash can sync with your RB67 lens.


Mamiya RB67 by Narsuitus, on Flickr