Guides

Astrophotography Image Processing with Graxpert, Siril & GIMP

This detailed guide walks you through the entire workflow of processing astrophotographs using three powerful, free software tools: GraXpert, Siril, and GIMP. By leveraging the combined strengths of these programs, you can achieve results that rival those produced by expensive, professional-grade software.

The book offers clear, step-by-step instructions to help you transform RAW and FITS images of astronomical objects into stunning final images. With a focus on clarity and accessibility, it breaks down the core processes to ensure that even beginners can follow along with ease.

In addition to traditional One-Shot Color (OSC) cameras, including both dedicated astrophotography cameras and DSLRs, the guide also covers the use of smart telescopes like the ZWO Seestar, making it an essential resource for a wide range of astrophotography enthusiasts.

Downloads

The guide uses images of M31, the Andromeda Galaxy as a worked example. Here’s how to get the files so you can follow along. Click the filename below to download a zip file containing M31.fit

M31.Zip

M31Final.Jpeg : As the name suggests this is the version after all processing stages, as described in the guide. This file is shown below so you can see what can be achieved using these free software systems. (Right Click to Download)

M31 Andromeda Galaxy
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