I have a Sony Nex-5R and I need to take pics with the side of the camera attached to a 1/4″ camera mount on a tripod (not the bottom of the camera, as usual). I was told to buy an L-bracket for my model. I did buy one on eBay. It fits the camera, but I don’t know how it attaches to a 1/4″ mount. The L-bracket has a rounded rectangle on the side, where I’d expect to attach it the 1/4″ mount. Am I missing some mechanical adapter?