Pics look really good to me, and if by plugable USB you mean the actual pluggable brand one the pics are AMAZING! I have the same One and I have been trying everything and I can't get clarity anywhere near that What resolution do you have it set up I'm curious ?
Hey thanks! I guess I am doing something right. Yes, it is the Plugable brand.
The resolution is set at 640x480. I also left all the settings at default.
I put the coin on a white sheet of paper, then I raised the USB camera high enough to fit the image of the coin, then used the focus. I used the light on the USB camera at about 75% and then set a shaded lamp angled almost directly above the camera. (With the shade in between the bulb and the camera so as not to have direct light on the coin).
As you can tell, the pictures I took at night seem to come out better than the ones I took during the day when sunlight was shining in the room. Perhaps it affected the cameras white balance?
Thanks for the feedback guys, I'll post more pics in the future.