Tri-Bahtinov masks for Skywatcher Celestron and much more.

Upon request, we can now also calculate Tri-Bahtinov masks for you.

These allow us to check the collimation of your telescope.

I need the aperture, focal length, and outer diameter of your tube to create a custom mask for you.

The picture shows the mask for a C11 Edge HD.

Clear Sky, Chris

This item can be ordered here:

http://www.3ddruck-krug.de/