On Sat, 1 Dec 2012 00:45:05 -0500, "Gary Eickmeier"
wrote:


"Trevor" wrote in message
...

"Gary Eickmeier" wrote in message
...
"PeterN" wrote in message
One major advantage of RAW, in addition to the previously mentioned
ones, is that you can easily edit the RAW image, non-destructively.

You can edit anything non-destructively.

Right, but you can't save it back to Jpeg non destructively, so why start
with a lossy Jpeg in the first place?
I can't see the point myself since you can easily set up PS or LR to
automaticly apply your camera settings when you open a RAW file if that's
all you want to do. If I really needed to print direct from the camera I
can save RAW+Jpeg, never do though.

I know what they mean by "non destructively" - that all of the edits are
saved in layers and can be undone at all times. But all I am saying is that
I do not edit on my JPGs and then save it back to the same JPG file I
started with - I save it as a new file, a TIFF, so that the original is
still there.

I'm sorry Gary, but the original was the raw file. It is inherent in
the nature of JPEGs that as soon as you save in that format you lose
image data.

http://zatz.com/connectedphotographe...n-jpeg-images/
explains it reasonably well but only recognizes the existence of RAW
files of up to 12 bits. For several years there have been cameras of
up to 14 bits.

It is correct that as described in the article there are 16 bit JPEG
files. The only problem is that only a very limited range of software
is capable of reading them.

In short, if you have a good camera you are restricting its
capabilities by using JPEG.
--

Regards,

Eric Stevens