Hydrogen 1 alpha images with our Lunt 60 PTDS*:
With H1a imaging, the specialized scope is able to able to pass a thin sliver of the visible spectrum at 656.28 nm (red) measuring <0.5 angstroms in width. This enables imaging the solar chromosphere where one can see filaments, prominences, sunspots, etc. Images are captured digitally in black and white and processed with specialized software to extract detail and add false colour. Following, are a variety of such images with brief annotations:
* PTDS refers to Pressure tuning and Double stacked
August 2015