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Re: [APML] strange halos around stars

To: astro-photo@seds.org
Subject: Re: [APML] strange halos around stars
From: Chris1011@aol.com
Date: Thu, 18 Jul 2002 16:18:26 EDT
Reply-To: astro-photo@seds.org
Sender: owner-astro-photo@seds.org

In a message dated 7/18/2002 12:44:36 PM Central Daylight Time, nmontec@libero.it writes:

At the edge of the photo I get stars with
an halo that is half red and half blue. Is this the so called COMA
aberration or something different?

You are describing lateral chromatic aberration. There may also be certain amounts of coma and astigmatism mixed in which would cause the stars to look like tiny seagulls..

Roland Christen

Follow-Ups:
- Re: [APML] strange halos around stars
  - From: Nicola Montecchiari <nmontec@libero.it>

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