Re: (IAAC) IR bandpass filters
--- Lew Gramer <email@example.com> wrote:
> Someone on a local Club e-list asked a question regarding special
> transmittance filters - basically, more "customized" versions of the
> well-known UHC, OIII, etc. filters. I believe the poster was an
> astro-imager, but thought this may be of interest to visual
> observers, too.
> Note that such filters are generally NOT inexpensive! Clear skies,
> Lew Gramer
You might also consider bandpass interference filters from Andover
Corporation [standard disclaimer -- I have no personal connection].
They offer a 50mm Hydrogen Alpha filter, for example, for $186 --
Lumicon's price range.
Filters are available for all parts of the spectrum; take your pick!
Thomas O'Hara, PhD
San Diego, California, USA
"O Memory! thou midway world Twixt earth and Paradise,
Where things decayed and loved ones lost
In dreamy shadows rise." -- Abraham Lincoln, 1844, Age 35
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