On Oct 30, 2017, Mayayana wrote
(in article ):

Contentious stuff snipped

The one thing I'm not sure I agree with: How is it that "SOOC" JPGs are not lossy? JPG compression is
lossy and various camera settings applied to the JPG will limit the data. There seems to be some kind
of cult developing about the purity of SOOC.

I believe we are talking at cross purposes.

SOOC JPGs are processed in-camera, and when compared with the corresponding
RAW files there is lossy in-camera compression.
There is a reason I went from shooting RAW only to RAW+JPG. With the Fujifilm
X-Series cameras the SOOC JPGs also have the Fujifilm film emulations
applied. These film emulations are not part of the RAW/RAF files.

Once imported into LR that original JPG will suffer no further compression.
However, since that SOOC JPG is an original which should not be adjusted
directly, with your editing workflow you would either make a copy, or a bmp,
or tiff to edit. With my LR/PS workflow, and as a matter of fact the
standalone On1 & Exposure X3 workflows, all use XMP sidecar files so that
all edits are nondestructive.Remember that with your bmp, or tiff copy, you
have a copy of an original lossy JPG. This is why, shooting RAW only, or
RAW+JPG, rather than JPG only are the better shooting options.

When it comes to the need for a JPG to share, regardless of what the original
file was, JPG, RAW, DNG, TIFF, PSD, there will be compression applied to the
created export JPG, resulting in a lossy file at the export destination, but
we all understand that JPG is going to be a second generation JPG if created
from the original SOOC JPG, and it will be compressed, and lossy when
compared with the original file.

If the exported JPG is sourced from the LR adjusted RAW, DNG, TIFF, PSD it
will actually be a first generation JPG. In all cases the LR user will
control the level of compression, and any resizing in that export dialog, and
in the case of my exported JPGs there is no expectation that any further
editing, or resaves should be made.

--

Regards,
Savageduck