Now that I've had a chance to sit down with my images of totality, I'm pretty puzzled as to how to get a decent HDR image. I followed Jerry Lodriguss's guide pretty closely and bracketed at 1/125 and 1/4 to get sequences of 1/500, 1/125, 1/30, 1/15, 1/4, and 1 second exposures all at ISO 100 and f 2.8. In retrospect I should've done shorter exposures overall, but the data doesn't seem so bad that I can't get a decent final product. I downloaded Alan Dyer's "How to Photograph The Solar Eclipse" and followed his workflow but I'm still pretty lost. I guess my main questions are as follows:
1) Should I stack each set of exposures prior to postprocessing? If so, what program is appropriate for this?
2) I have a problem with my longer exposures where the brightness of the corona creates posterization around the center. The whole center of the image is highly overexposed. Would flats correct this? If not, how would you go about fixing this? I only really do deep sky imaging in narrowband so this isn't really an issue I've faced before.
3) Since I used a fixed tripod and not a tracking mount, my frames aren't aligned. When I manually align the long exposures with the short ones, everything except Regulus seems to align. Any idea why this might be?