In article , Tony Cooper
wrote:


Why would anyone use Tiff? Why not just leave the file in RAW format?

I didn't think you could edit a RAW file and save it back as RAW.
I thought TIFF files could be saved with LZW compression anyway.


Those of us who do this understand that the original RAW file is not
changed. It remains wherever is was originally downloaded to from the
camera, and LR "points" to it. After the RAW file is opened in PS,
and edited in PS, the edited version is "Saved As" a .psd, .jpg,
.tiff, or whatever. Both the edited file and the RAW file appear in
LR, but are not "in" LR.

apparently you don't understand as much as you think you do (no
surprise there), since any photo added to lightroom is 'in' lightroom.

this includes raws and anything round-tripped to an external editor.
it's also not a good idea to use save as..., certainly not to a jpeg.