Howdy!

So, the creator of the new project PhotoFlow, Andrea Ferrero, has taken the time to outline a workflow for stitching a panorama image with Hugin, and exposure blending multiple exposures in PhotoFlow. While not GIMP specific, I thought there might be a few photography-related folks who could find some interest in it (hence why I am posting here). If anyone is interested:

A Blended Panorama with PhotoFlow

I found Hugin doesn't give me the same position across different EV set, ie they don't line up perfectly after stitching each EV layer. May be because I was not using a tripod.

A tripod certainly helps!

You could also work on stitching each of the stacks individually, then the pano (or the panos for each EV first, then the stacks). That way you should be able to align the EV stacks with identical control points?

May be this is what I need.

http://www.sonyalpharumors.com/sr3-sony-a7000-is-the-first-e-mount-camera-with-15-5-stops-on-sensor-hdr/