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One Click Switch Between Horizontal/Vertical Shooting: SMALLRIG Rotatable Collar Mount Plate 4570 is designed for Sony A7C II / A7CR. No need to disassemble the camera, just loosen the knob to switch between horizontal and vertical shooting without changing the center of the lens optical axis. Bottom Quick-Release Plate for Arca/for Manfrotto RC2 Tripod: The quick-release plate at the bottom of the rotatable horizontal-to-vertical mount plate can be used for Arca and for Manfrotto RC2 tripod. Full Access Design: Connect to the bottom of the camera through a 1/4”-20 screw and positioning pin. It will not interfere with the body interface and the flipping of the LCD screen. It has a built-in protective gasket to prevent the camera from being scratched and deflected. The battery compartment has an opening and closing wrench, which fits the body and improves the grip. Multiple Installation Interfaces: Built-in multiple expansion interfaces, such as 1/4”-20 holes, 3/8”-16 holes, which can attach Side Handle 4015, Magic Arm 4194 and other accessories. Comfortable Grip: The base plate protects the bottom of the camera and improves the handheld experience. It can be used independently to meet the needs of different shooting scenes. Built-in magnetic slotted wrench, easy to use and disassemble. Compatibility Tip: If you use a lens adapter ring, please note that this product is only compatible with lens adapter rings with an outer diameter less than 63mm. For lens adapter rings with supporting feet, the supporting feet need to be removed first. This product is not compatible with some E-mount full-frame lenses, please refer to the picture for details.