Articles Scale per pixel One of the important information in astrophotography is a scale (arcsec) per pixel; let's calculate it. Articles DIY motor focuser A project of motor focuser based on the Pololu Tic controller. Articles DIY flatfield panel A project of flatfield panel. Articles Glossary & abbreviations Astro and astrophotography glossary. It also contains links to appropriate articles, so partially it can be treated as the index.