3 Legged Thing QR10 Plate The new QR10-L Quick Release Plate comes with a 100mm base, side bracket with cable access & 1/4”-20 accessory mount, compatible with standard Arca Swiss® clamps & heads. Designed to make the switch from landscape to portrait quick & easy, & with a side mount for optional accessories, the QR10-L takes L Bracket functionality into the 21st century. The QR10-L is also compatible with most DLSR’s. In order to comfortably fit your camera, the centre of the screw socket on the underside of your camera should be no further than 7.5cm / 3" from the left edge of your camera.