Baader Planetarium50.8 mm ClickLock SC Clamp - Black

This isn't cheap by any means but the quality is absolutely top drawer. Eyepieces are gripped firmly and easily with none of the slightly uneven and slightly off-centre effect that you sometimes get with a regular compression ring or set screw set up. If you are a half serious astronomer with good quality kit then this is a seriously good investment to make.

Holds attachments very secure and centered.I wouldn't trust my camera to anything else now. It never felt safe on the supplied thumb screw clamp.

solid bit of gear makes swapping out optical train bits super easy

Expensive but does the job well.

Expensive but easy to use.

Superbly designed and built product, makes changing eyepieces so easy. It locks on so securely. Thoroughly recommended..