If you're a professional photographer seeking a reliable and versatile mounting solution for your Sony Alpha 7R V, Alpha 7 Iv, Alpha 7S Iii, or Alpha 7R Iv camera, the SmallRig 4148 Rotatable Horizontal-to-Vertical Mount Plate Kit is the perfect accessory for you. This high-quality mount plate kit is designed to provide a seamless transition between horizontal and vertical shooting modes, without the need to adjust the lens optical axis. Constructed with a sturdy 1/4"-20 screw and anti-twist pin, this mount securely locks onto the bottom of your camera, ensuring stability during your shoots. The thoughtful design of this mount plate kit allows full access to the Lcd flip screen, ports, and other camera features, enhancing your shooting experience. The SmallRig 4148 Mount Plate Kit is compatible with both Arca-type and Manfrotto RC2 tripods, offering you the flexibility to use your preferred equipment.