Re: [APML] Off Topic - Where can I find small size light pollution filters?

[Matt BenDaniel <matt@starmatt.com>]

Interference filters are not easy to cut, even by an optician. Any delamination could ruin the filter. You might want to coat the filter with wax to protect it during cutting. However, cleaning off the wax may be a problem, because you'd probably want to avoid solvents and hot water.

Matt

At 05:24 PM 9/22/2001 -0400, ZenAstro wrote:
>I've used the 1.25 inch Lumicon UHC filters (in the cells) in my binoculars. I guess I was just lucky they fit just right in the rubber eyecups.
>
>You could always get an optician to cut them to size from a larger filter.
>
>Keep an eye on the exit pupil recommendations to match the filter to the binoculars and the sky conditions.  Lumicon has that info.
>
>
>
>>I'm trying to find small size light pollution filters for some binocular
>>eyepieces.  Mounted/cell size of .965 inch diameter would work, and
>>unmounted size of 0.75 inch diameter would also work.  I'm trying to find
>>narrow band filters, such as the Lumicon OIII and H-Beta.  (Bill Vorce of
>>Telescope Warehouse has some .965 mounted Deep Sky filters...but they are a
>>bit wider passband than I would ideally prefer.)
>>
>>I also called Lumicon and they said they don't carry filters in anything
>>smaller than 1 1/4 inch.
>>
>>Any ideas on suppliers?
>>
>>Thanks in advance,
>>Tom Krajci
>>
>>
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--
Matt BenDaniel
http://starmatt.com


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