I recently purchased the new Sigma 24-105mm f4 Ďartí lens for my Nikon D800E (the Nikon F mount version just began shipping here in Germany). Lightroom has, as yet, no lens profile for this lens. However, several days ago Adobe released their latest ACR update (version 8.4 RC) which, among other things, includes a lens profile for the Sigma lens. Until Lightroom releases their next update which, I assume, will also include the new Sigma lens profile, I thought a possible workaround could be as follows: import into LR (default procedure), open the photos in ACR (via Bridge), apply the lens profile, and then save the files back to their original folder as 16-bit DNGís (ProPhoto RGB working space). Then all I would need to do is synchronize the folder in LR and import the new DNGís. The problem is, itís not working! Though the profiles are definitely being applied in ACR, after importing the DNGís back into LR, they remain unaltered (no profile applied!). However, if I save those same photos in ACR as 16-bit TIFFís, the lens profiles survive the re-import into LR perfectly! Obviously, there is something concerning DNGís and their relationship to ACR and LR which I unfortunately do not understand! Whatís happening here? Iíd really appreciate help with this. If possible, I would infinitely prefer to work with DNGís because the files are so much smaller than their corresponding TIFFís.
Many thanks in advance,