On Sat, 14 Feb 2004 15:34:05 GMT, "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 an older O-III from Lumicon that has no markings on the ring.
It came in a Lumicon blue case with the filter's transmission
characteristics written on it. A Quick check with a spectrometer
confirmed that it was indeed an O-III.

Cheers,

- Craig

Craig Levine
Observing Chairman
RASC, Halifax Centre
www.halifax.rasc.ca