Camera accessory and camera system

A camera accessory, wherein the camera accessory is configured to be mounted to a camera body having a first mounting seat, the first mounting seat comprising a plurality of first claws;

• the camera accessory comprising:
• a second mounting seat, the second mounting seat comprising a plurality of second claws;
• the second mounting seat being configured to rotate relative to the first mounting seat between a first state and a second state, wherein in the first state, the second claws are each inserted between the first claws;
• wherein in the second state, the second claws engage with the first claws;
• a latch structure, wherein the latch structure is movably arranged on an outer ring surface of the second mounting seat that engages with the first claw, and when the second mounting seat rotates relative to the first mounting seat between the first state and the second state, the latch structure retracts into the outer ring surface;
• when the second mounting seat is in the second state relative to the first mounting seat, the latch structure projects from the outer ring surface and engages with the first claw to restrict the second mounting seat from rotating from the second state to the first state.