This L-Bracket for Canon EOS R1 from Really Right Stuff is made from 6061-T6 aircraft-grade aluminum and is compatible with most Arca-type systems. This additional mounting option allows you to quickly change between landscape and portrait orientations and minimizes the need to recompose your shot. The plates are equipped with anti-twist flanges for precise alignment. The L-Bracket has a conventional base plate and an L-plate that mounts on the left-hand side of the base plate. This modular design lets you remove the added L-component for a slimmer profile or when you need maximum access to the side ports. A custom-machined 1/4"-20 mounting screw threads into the tripod mounting socket of your camera body.