The 30 mm rotary coaxial plate provided by LBTEK consists of two coaxial plates, one for fixing in free space or a 30 mm coaxial system, and the other allowing the connected coaxial components to rotate. When rotating the intermediate coaxial section of the coaxial system, install it as shown in the right figure. Each coaxial plate has four coaxial blind holes on the side, and coaxial rods should not penetrate during installation. The coaxial rods are fixed using M4 set screws. The fixed coaxial plate features a central SM1 threaded through hole, allowing installation of optical components up to 21 mm thickness and 25.4 mm in diameter using two SM1R retaining rings. The bottom has M4 threaded mounting holes for connecting optical rods. The rotary coaxial plate and the central SM1 threaded hole are independent, ensuring that rotation does not affect the optical components. The coaxial plate is engraved with 2° division marks for manual positioning. After rotation adjustment, it can be locked using a flexible locking mechanism. All adjustments are made using a 2 mm hex wrench.