**Capturing 428-750THz Signals: Astrophotography in Light Polluted London - Szymon - M0GZP**

Radio Hams are often interested in Radio Astronomy either the study of celestial objects at radio frequencies using radio telescopes or radio inferometry, or closer to home the detection of meteors using reflected signals. 

Radio frequencies are not however the only emissions coming from deep space; of particular interest to humans are those between 428-750 Terahertz, or 400-700nm wavelengths, also known as the visual spectrum. Capturing all of these visible emissions can create beautiful photos of galaxies from dark skies; however, from Light Polluted London better results are achieved by focussing on very narrow bandwidth emissions, such as Hydrogen Alpha (656nm), Oxygen 3 (501nm) and Sulphur 2 (672nm). 

This presentation will discuss the equipment and techniques used for capturing these emissions and explain how individual narrow-band captures are combined to present a colour image showing the merged emission lines in a stunning visual representation of intergalactic nebulae.

**Questions**


Please use the following space to capture any questions or comments you wish to ask/share on the night. Everyone will have the chance to ask their own but this gives those unable to attend, or who are happy give Szymon advance notice, a chance to share: