[WDHewson]

That's a fine discussion of JPEG and other files.

Thanks.

One of my fallback technical photo websites is called, I think, Cambridge in Color. But here's a link to their discussion of JPEG. And they mention a link to raw therein.

http://www.cambridgeincolour.com/tutoria...etypes.htm

One of my conclusions, for now at least, is that it's nearly, or maybe totally, impossible to know what the camera's algorithms are to process the sensor, then create a file, then download a file. And equally difficult to know what all the editing and file conversions and file saving does.

You should see the mess that my iPhone makes of JPEGs when you edit them with the iPhone software.

This software processing, upon processing, upon processing, seems an indecipherable jungle to me.

But it still beats processing with silver halide salts.