Year of the Comet
Comet C/2011 L4 (PANSTARRS)

PANSTARRS information

Comet C/2012 S1 (ISON)

ISON information

Tony Hallas' Cosmic Imaging

Adding color to Hydrogen-alpha, part 2

August 2011: Use this creative processing technique to jazz up your images.
Contributed by Tony Hallas
Published: June 27, 2011
Tony Hallas
In my previous column, I showed you how to combine a Hydrogen-alpha (Hα) image with luminance exposures to create a “Hα-luminance hybrid.” Now I want to go further and look at a way to combine the Hα with the color-rich LRGB data.

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