Older Lumicon Filter Question

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

Does anyone have an older Lumicon filter that is not in a ring that says
"Lumicon?"


Hi Alan:

Don't know if I've seen one that doesn't say "Lumicon," but their markings
could vary, for sure. For example, the OIII I bought in 1995 says "Lumicon
Galaxy" (!)...

Peace,
Rod Mollise
Author of _Choosing and Using a Schmidt Cassegrain Telescope_
Like SCTs and MCTs?
Check-out sct-user, the mailing list for CAT fanciers!
Goto http://members.aol.com/RMOLLISE/index.html

Does anyone have an older Lumicon filter that is not in a ring that says
"Lumicon?"


Hi Alan:

Don't know if I've seen one that doesn't say "Lumicon," but their markings
could vary, for sure. For example, the OIII I bought in 1995 says "Lumicon
Galaxy" (!)...

Peace,
Rod Mollise
Author of _Choosing and Using a Schmidt Cassegrain Telescope_
Like SCTs and MCTs?
Check-out sct-user, the mailing list for CAT fanciers!
Goto http://members.aol.com/RMOLLISE/index.html

Alan:
I have some Lumicon's that have no markings. Tends to be a pain if you
don't return them to the correct filter case.
I guess they used what ever they had around.
Bill

--
www.optiguy.com

"Rod Mollise" wrote in message
...
Does anyone have an older Lumicon filter that is not in a ring that says
"Lumicon?"


Hi Alan:

Don't know if I've seen one that doesn't say "Lumicon," but their markings
could vary, for sure. For example, the OIII I bought in 1995 says "Lumicon
Galaxy" (!)...

Peace,
Rod Mollise
Author of _Choosing and Using a Schmidt Cassegrain Telescope_
Like SCTs and MCTs?
Check-out sct-user, the mailing list for CAT fanciers!
Goto http://members.aol.com/RMOLLISE/index.html

Alan:
I have some Lumicon's that have no markings. Tends to be a pain if you
don't return them to the correct filter case.
I guess they used what ever they had around.
Bill

--
www.optiguy.com

"Rod Mollise" wrote in message
...
Does anyone have an older Lumicon filter that is not in a ring that says
"Lumicon?"


Hi Alan:

Don't know if I've seen one that doesn't say "Lumicon," but their markings
could vary, for sure. For example, the OIII I bought in 1995 says "Lumicon
Galaxy" (!)...

Peace,
Rod Mollise
Author of _Choosing and Using a Schmidt Cassegrain Telescope_
Like SCTs and MCTs?
Check-out sct-user, the mailing list for CAT fanciers!
Goto http://members.aol.com/RMOLLISE/index.html

In message , Alan French
writes
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.

A reasonable heuristic test of whether or not the ring is a Lumicon one
is whether or not the thread is a decent fit onto your eyepieces.
Lumicons filter technology was marvellous, but the mechanical
construction of their threaded carrier was always pretty iffy for as
long as I can remember.

Possible you have genuine Lumicon glass rehoused in a new correctly
threaded carrier. Best bet is measure it's transmission spectrum
photographically and compare it with the ones on Maurice Gavin's site.

Regards,
--
Martin Brown

In message , Alan French
writes
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.

A reasonable heuristic test of whether or not the ring is a Lumicon one
is whether or not the thread is a decent fit onto your eyepieces.
Lumicons filter technology was marvellous, but the mechanical
construction of their threaded carrier was always pretty iffy for as
long as I can remember.

Possible you have genuine Lumicon glass rehoused in a new correctly
threaded carrier. Best bet is measure it's transmission spectrum
photographically and compare it with the ones on Maurice Gavin's site.

Regards,
--
Martin Brown

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

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

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.