Solar Imaging with DayStar Filters
Seeing this day was exceptional.
It should be noted that the sharp detail in this filter is not relevant to the FWHM. All the high resolution detail is possible because the seeing allowed sub arc second resolution of detail.
We image at 3000mm, so we are usually seeing limited.
This is why we image in video .avi files and sort for the sharpest frame.
Once we determine the sharpest frame, we usually edit just that one single frame. Stacking is usually not effective, because of the movement in active regions and fast moving spicule. This is one single, sorted frame.
A note about editing:
In this image, we noticed very high detail in the prominence as well as the surface. In photoshop, the original BLACK AND WHITE file (sorted for sharpness out of the .AVI file) was copied and pasted into a layer above. The top later was edited for surface densities. The bottom layer was edited for the prominence. A magic wand selection of the black backround allows us to remove the black which covers the prominence work below.
Once flattened, then we colorize by varation midtones in the R/G/B channels. After color balance is achieved, we sharpen. Our method sometimes includes a 2 part sharpen. This file only required on unsharp mask of about (Amount: 50) (radius: 2). In general, the first sharpen would be a larger radius of 4-8 with a very low amount of 10-25. The second sharpen would (depending on the final file size) be higher amount and lower radius. For web resolutions, we like to keep the final sharpen amount < 1.0 to avoid oversharpening.
Oversharpening causes a 'halo' effect around dark features and ultimately kills small details.