Alan French wrote:

Does anyone have an older Lumicon filter that is not in a ring that says
"Lumicon?" I know some filters I saw in the early days of light pollution
filters seemed to use rings from other sources.

We have a filter that is supposed to be a Lumicon UHC, but that is not what
the ring says.

Thanks, and clear skies, Alan


I have a Lumicon deep sky filter bought in 1988. No marking on the ring.