It was the simplest part of the process.
I shot manual exposures every 5 minutes on a stationary camera with a 70mm lens (24-70).
I manually adjusted exposure in the camera to get something I thought would be usable. I used that exposure throughout the entire sequence.
When I imported them into lightroom, most were pretty evenly exposed, though maybe a little under exposed and more orange than I would like.
The images of the sun straight out of the camera looked a bit orange , so first I increased the exposure turning the sun more white. I wanted a yellow "sun color" though, so I played with the color temperature of the sun images to get the yellow.
To make them even in Lightroom, I simply increased exposure on the ones that were a little under to match the ones I thought were proper.
The shots just before and after annularity required more of an exposure bump up, the one farther away less so, and the ones in the early and late phases served as a guide for how much to increase exposure, just so, to my eye, they looked equally bright...IOW nothing fancy, just eyeballing it and changing exposure in the computer.
I tweaked the whole image after the composite using masks, but that was primarily on the landscape part of it, not the sequence.
It sounds complex, but it wasn't. I increased exposure on all of the "suns" to make them all even—eyeballing it— then changed to color temp to make them yellow.
Thanks!