@a1ex: I uploaded a comparison (deleted, see #2059), where you can see what I speak about. I processed the cr2s (shooting -> M, Dual ISO: 100/1600, f8, 1/30s, wb: daylight) with the newest cr2hdr-20bit without --same-levels command and after that I imported them into Lightroom. On the histogram jpgs you can see, that the pieces of the sphere panorama has the same settings (wb, exp, shad, highl), I exported them as 16bit TIF and stiched them in PTGui, so I got the panorama_01.jpg (It is resized and I cut the bottom part of the panorama). You can see the dark part (computer desk, chair, window, couch, till door on the right and a part of the ceiling) on the panorama. Take a look at the panorama_02.jpg, at this processing I pushed up the exposure manually (let's say expose to the middle) at the darker pieces and the problematic part looks much better after the stiching.
So if I see the histogram at the second processing all of the pictures are shifted to the middle. Is there a way to analyze the full histogram + setup a base exposure shift for all dngs (let's say +1,5EV) + after that setup a reference picture manually (let's say, this picture is the perfect middle) + after that shift (+/-) the other pictures exposure to the middle automatically? Of course there will be some difference between the pictures after the export (at panorama_02.jpg I had minimal differences), but PTGui done the rest shift at blending/stiching.
Update: When I shoot this panorama, I metered the light in 2 directions at -1EV (to the lightest and to the darkest) in AV mode and after that I switched to M mode and setup the avarage between this two.
So if I see the histogram at the second processing all of the pictures are shifted to the middle. Is there a way to analyze the full histogram + setup a base exposure shift for all dngs (let's say +1,5EV) + after that setup a reference picture manually (let's say, this picture is the perfect middle) + after that shift (+/-) the other pictures exposure to the middle automatically? Of course there will be some difference between the pictures after the export (at panorama_02.jpg I had minimal differences), but PTGui done the rest shift at blending/stiching.
Update: When I shoot this panorama, I metered the light in 2 directions at -1EV (to the lightest and to the darkest) in AV mode and after that I switched to M mode and setup the avarage between this two.