TPO Self-centering 2-inch to 1.25-inch adapter: is designed for the use of 1.25-inch accessories in a 2-inch diagonal, focuser, or other accessory with a 2-inch barrel.
This CNC machined adapter uses a helical compression mechanism to safely and accurately hold and center your 1.25-inch accessory. Additionally, the barrel is threaded to accept 2-inch filters.
Helical compression mechanism: the preferred connection style. (The other simple thumbscrew locking style will push the inserted barrel laterally, leading to your accessory being off-center.)
To use the self-centering adapter, simply rotate the knurled top ring to lock your accessory in place, and twist in the opposite direction to release it.