On mercredi 12 janvier 2022 12:08:08 CET Frank J. wrote: > Am 10.01.22 um 22:12 schrieb bwh vanBeest: > > Hi, > > When I import a series of images straight from the camera (Nikon > > D850, Nikon nef format) in Darktable (scene-referred workflow), the > > images invariably show up as way too dark, as if they are > > underexposed. The histogram shows a big unexposed part on the > > highlights. I am pretty sure though that when I took the pictures the > > exposure is about right (according to the camera histogram). The > > camera-generated jpg is also ok. > > What can be the cause of this and what can I do about it? > > > > Kind Regards, > > Bertwim > > Same effect here. > > I use Olympus-cameras, RAW only, correction +/- 0 EV in the Camera. > > After importing in DT the default in module "exposure" is "+0.5 EV" but > this is too dark for nearly all pictures. > > I need to use a correction between +1.5 and +2.5 EV for the best look. > > This is not new in DT 3.8 but in 3.6 (or 3.4?) with the change to > scene-referred workflow. > > I never compared with camera JPG. > > Frank You have two effects here: one is the exposure of the middle gray parts of your image (the one that "exposure" works on), the other is the tone curve applied by the camera. That tonecurve can add quite a bit of midtone contrast, limiting the room available for shadows and highlights, and also increase the apparent exposure a bit (to "protect" the shadows). That tone curve is replaced by filmic, which tends to be softer/more delicate with the shadows and the highlights.
The correction you need to apply in exposure seems to depend on the camera brand, I find I need to add about 1-1.5 EV for my Sony. Remco ____________________________________________________________________________ darktable user mailing list to unsubscribe send a mail to darktable-user+unsubscr...@lists.darktable.org
