The plate on your camera body is typically oriented from side to side, but to attach brackets directly to the camera plate for macro and other applications it needs to be parallel to the axis of your lens. The Perpendicular Plate creates a usable dovetail section for attaching Wimberley telephoto and macro brackets to your camera body. It also can serve as a small macro slider for making a total of 1.7" of forward-backward adjustments for macro photography. Another application allows you to attach two Wimberley macro brackets to your camera body while still leaving enough room to attach the entire setup to your tripod head. The components in the Wimberley flash bracket system are sturdy, lightweight fully intercompatible, and require no tools to attach, adjust, or disassemble. Each features an Arca-Swiss style quick-release clamp: easy to affix, adjust and remove. Connections are solid and don't twist, creep, or slip apart. Parts can be disassembled for easy storage. The Wimberley brackets work best with Wimberley quick-release plates, but often work with other Arca-Swiss style plates. Aluminum components are milled from solid 6061 T6 aluminum and are black anodized, fasteners are stainless steel, and knobs are captive.