The Sirui TY-350 Telephoto Lens Support Plate is an Arca-compatible plate specifically designed to provide a stable and steady platform for your camera body and telephoto lens. Conventional quick release plates have a single contact point, leaving your camera or lens unsupported. This is unstable and puts stress on the joint between the camera and lens. The TY-350 has dual screws that attach to the lens foot, and an adjustable vertical support for the camera body. This takes the weight of the camera off the lens foot and provides an additional contact point, adding stability. A quick release plate is included for the camera body to make it easier to put on and take off. Three long channels let you precisely center the weight of the camera and lens over the head, ensuring your rig isn't front or rear heavy, adding even more stability.