D.Duck wrote:
"Reginald P. Smithers III, Esq." wrote in message
...

snip

I did shoot these in RAW with no compression on the RAW. I use a batch
conversion macro in Lightroom (I think), and had it set up 640x480 size
with auto sharpen Landscape. I have never seen a jpg compression ratio, I
thought jpg just compressed it as much as possible. I also have never
used a batch conversion before, and never reduce the size so small, so I
really don't know if this is the result to expect or not.

If you're not familiar with jpeg file compression you may want to check out
the link below. Every time you compress a jpeg file it will lose detail.
It's cumulative and you can't go back. It's always best to work on a copy
so the original retains its detail.

http://graphicssoft.about.com/od/for...mythsfacts.htm



Thanks for the link. That is why I shot in RAW, and don't use jpgs
except to upload to the web, which I normally set the quality to
"maximum", but since I was uploading a batch of files, I set the quality
to a small size. After reading your web site, I can see that is what
Tom meant by compression. I just thought it reduced the size of the
physical size of the image, it looks like it also changes the
compression ratio.