Astrophotography and image processing

A short guide that explains how to use FITS Liberator to convert FITS files to TIFF files for processing in Photoshop.
Using FITS Liberator with SPIRIT (PDF file, 1.7 Mb)

Creating a colour image with SPIRIT using Photoshop (from the SPIRIT 103 workshop).
LRGB Photoshop v2 (PDF file, 4.8 Mb)

The New Astro Zone System for Astro Imaging – a book by Ron Wodaski and provided free to authorised teachers and students using SPIRIT. (Zipped PDF file, 6.8 Mb, requires password to unlock)