Do you have a single filter that you would like to use on your telescope?

A small, delicate glass disc needs to be placed in a suitable cell. I offer cells for 1.25" (M28.5 thread) and 2" (M48 thread).

Of course, I can also get you all other diameters - it just takes a little longer.

Upon request, I can adjust the cells to the diameter and thickness of your filter.