In order to obtain my hallmark blue-violet-ish Sun, with the active regions as white, I obtain the brighter-than-average information, long story short, this picture below. While this is usually nothing more than the saturation layer negative I use, now I publish it, cause why not, it looks awesome. Actually, I’ve seen quite many „black suns” that were negatives, curved in weird ways, especially for hydrogen alpha, a sloppy way to deal with the prominences that are much fainter than the bright limb. The Sun below is neither. It is >>the Sun<< in normal light, minus the boring part, which I also posted, for reference.

EQ3-mod, mountpusher, Sharpstar 60/330 ED-APO, Lunt CaK B600 LS6CAKMDS2, ASI 178MM (cooled)

And below the false color picture obtained by colorizing the recording, and then desaturating the regions brighter than the local limb average, thus highlighting the active regions.

The stack

The median of the stack: almost nothing but the limb darkening

(stack minus flat) with curves

the usual milka