TS Optics 2″ Parfocalizing Ring / CCD Locking Ring

This adaptor fits directly onto barrels of eyepieces and adaptors. It can be locked in place with three slug screws. The adaptor is usually used to create a firm stop at a position of your choice, for example if you wish to parfocalize your eyepieces, or if you want to have a repeating focus position for your camera.