Bridge Plate adapter BPA-1 35
The bridge plate BP-13 is equivalent to the BP-12, but for 15 mm
studio rods.
8.7 Bridge Plate adapter BPA-1
The bridge plate adapter BPA-1 can be used to attach a BP-3/BP-5/BP-
8/BP-9 to ALEXA. First attach the BPA-1 to the camera with the two screws.
Then attach the bridge plate to the adaptor with its two screws. Make sure
the screws are tightened firmly with a screwdriver.