The photographs below show the sun in the Hydrogen-alpha (H-a) bandwidth using a PST Stage 2 Lyra Optic 4″ f/11 refractor modified for H-a imaging captured with DMK41 and DMK21 mono CCD cameras and sometimes a 2.5x Powermate for the closeup detail.
The development of the Lyra Optic 4″ f/11 H-a Solarscope can be seen here
A short tutorial for processing the Hydrogen Alpha photographs can be read on this page
Current solar images from June 2012, taken using the excellent Daves Solar System Recorder software (DSSR) which is now available for public use.
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