The quick release L-bracket LC-530 fits the Canon 5D Mark IIIwithout battery grip
Custom-made one-piece bracket machined from light weight 6061T6 aluminum.
Allows full access to rubber side hatches.
Allows full use of the remote switch even in the vertical format.
Custom fit with dedicated design for Canon 5D Mark III
Made of highest quality duralumin.
Hand strap hole.
Scratch resistant hard-anodized surface.
Safe and ergonomically rounded corners and edges.
Extra 1/4" hole for a monopod.
Compatible with other major manufacturers' Arca-Swiss style
Comes with a wide headed 1/4"-20 screw (HB1.)
" Get an L-bracket
If you area keen tripod user, an L-bracket can make a massive difference. It allows effortless switching from horizontal to vertical framing, keeping all the weight on top and the lens in the same position. It´s far better than flipping the head 90 degrees, which can seriously unbalance the tripod and compromise stability"
(Article from Advanced Photographer UK)