Today Mercury set its path in front of the sun. The tiny black spot was a nice view to observe. As I was in the office that day, I used a tripod, 1000mm lens and a wired remote trigger to capture a few impressions of the event:
I questioned myself whether it would be possible to enhance images of the sun using deep sky H-alpha filters. Most likely a filter with 7nm bandwidth would not show prominences. Prominences are so dim, that the rather wide bandwith of the deep sky filter passes too much of bright light to see them. Keep in mind, that typical solar H-alpha filters are in the range of 0.3-1.5 Angstrom, which is 100 times more narrow than the deep sky filter (7nm = 70 Angstrom).
But who knows – perhaps the granulation becomes visible or at least the surface texture may improve…
ATTENTION: Never ever look direct at the sun! You risk your eye-sight, especially through optical instruments without proper equippment! I use specialized filters, suitable for solar work
I think, the result speaks for itself! It is an significant improvement, as the surface texture is no longer flat!