> [Astro Filter Pack][1] is a set of free software filters is designed
> for amateur astronomers doing video astronomy. Typically, such
> astronomers use standard video processing software that only lets
> them control the basic gamma, brightness, contrast, etc. These
> adjustments are simply not adequate for astronomy, so we have
> developed a specialized set of filters which are pure magic!

Compatibility
Architecture: PPC x86 (Intel:Mac)

\- Requires Mac OS 10.6 or later
\- Requires [CamTwist][2] to use.

To install the Astro Filters in CamTwist, simply drop them into the
Effects folder in the CamTwist folder.

Proper order required:

1\. Stack
2\. Dark Frame (optional)*
3\. Amp Glow
4\. DSO Enhancer
5\. Noise Mask

* "We recommend you only use the Dark Frame filter when absolutely
necessary. The other filters will generally get you the results you
need without the hassle of using a Dark Frame."

  [1]: https://pangeasoft.net/astro/index.html
  [2]: http://macintoshgarden.org/apps/camtwist