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Re: [APML] Achromats?

To: <astro-photo@seds.org>
Subject: Re: [APML] Achromats?
From: "Jim Janusz" <jjanusz@dc.rr.com>
Date: Mon, 8 Jul 2002 12:51:37 -0700
References: <MABBJIPKMOFMMHCDJJNKAEFIFLAA.bbatty@nseaa.com> <000b01c2269c$f08e3380$22d2abd8@oemcomputer> <3D29EBAD.3143C2CD@cox.net>
Reply-To: astro-photo@seds.org
Sender: owner-astro-photo@seds.org

Does anyone know the bandwidth of the Lumicon h-alpha filters?

Just curious.

Jim


snip 
> One good use for an achromat is for h-alpha imaging. The Custom
> Scientific h-alpha filters are 3-4nm in width and so the color within
> this range has pretty much the same focus. 3-4nm is much narrower than
> say a red tricolor filter which might be a 100nm wide. 
snip


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References:
- [APML] Achromats?
  - From: "Blair Batty" <bbatty@nseaa.com>
- Re: [APML] Achromats?
  - From: "Tony Hallas" <tonyhallas@foothill.net>
- Re: [APML] Achromats?
  - From: lkt <tan@cox.net>

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