Anthony Ayiomamitis wrote:

On 6 ???, 17:42, Dave Typinski wrote:

Very nice; thanks! *I know not all computer monitors display the same
thing, but on mine it's easy to see the difference in brightness
around Tycho in the first two images. *I'm surprised that the third
image doesn't show a greater difference.

I am also disappointed with the third image and, in fact, I am
puzzled.

I pulled in into Photoshop and created a negative image; this
difference shows up better, but still not as much as one might think.
This may simply be the way visual perception works.

You could make it more apparent by editing the levels in Photoshop,
but then it wouldn't be "real."
--
Dave