Thank you Victor.
A few uneducated comments about all this. I think there are at least one and probably two things I did differently in my test that diverge from Yunli’s instructions and the images he included in the first post.
First, based on Doug’s comment about the back using the dark frame from the initial capture, I took the first shot at a shutter speed that was the same order of magnitude as I planned for the test images. I did not simply take a 1/60 sec frame once in Aerial mode. Don’t know how much this matters, but (as Miska posted) it seems to me the prudent thing to do. By the way, at 100% I do see stuck pixels in the Aerial-mode shots, so I’m pretty sure I did all this correctly.
Second, it appears to me that the images in Yunli’s first post are dramatically pushed. Both shadows and the image overall. Mine are not. If anything mine are a tiny bit overexposed. On the hottest image, RD shows 0.2% pixels overexposed in the green channel. Not bad if I may say so myself, but I think very different from the images in Yunli’s first post. Yunli, if you have access to the original images, could you please post what they looked like without any post processing?
The third, obvious thing I did differently was I used my DB, not the one in question. So of course this could be a problem with that back.
Here’s the thing (and I’m going way in the weeds here). All this could be because somewhere in the pipeline, very dark areas get a magenta twist when there is a very long exposure. I could continue to investigate some things to figure out which of the above is the issue, but it just takes too long and I don’t really see a benefit. What I mean is, we might have a situation where under very long exposures, and the photographer turns off LENR(maybe/maybe not), and then the subsequent image is pushed dramatically because it is underexposed, the shadows look bad.
Well, if I had an image that was underexposed, I would kick myself and do it right the next time. But I get that some people thrive on these types of images and rely in the ability to do this type of processing. Not me though. I think I’ve shown that a properly-exposed shot is fine out to at least 15-20 minutes, regardless of whether you use Aerial mode or not. That was really all I was interested in. I did learn some things so I am happy for that!
Note: I sent Yunli my three raw files. If anyone else wants to see them pm me and I will send you the link.