Sorry I took so long.. trying another experiment.
I grab this cool high rez wallpaper off a website:
Attachment 186235
Then I took a screen grab of it on my z10 .. and here's the file:
Attachment 186236
I've copied both files over to my computer and reviewed the image quality. Other than the original high rez file had a square aspect ratio, and of course when I screen capture it I will get a loss of resolution due to trying to fit a square into a rectangle.. I see no loss of quality from the screen grab. What do you think?
ASIDE: I'm gonna try to screen capture one with the same aspect ratio right now..