Opinions?

Superdave should chime in before too long. He is pretty much the resident expert, and I think is possibly familiar with this camera. Having said that, I do agree with John that it looks like it could use some more light. Also, are there settings on the camera for resloution level? Kind of like regular quality, high quality, super high quality that would bring up the resolution? Almost seems as if you're on a lower level to be able to store more pictures on a card. Just a tad blurry in my eyes. Almost like the "sharpness" is a bit off. Of course it could just be my eyes. lol

Not sure how far away from the coin you are, but you may want to try being about 8-12 inches away and not use any macro setting. Zoom in as far as you can and still retain focus. That will allow you more room to put some light on the coin. Then you can post process and make the pic bigger.

My thoughts?

I think you're approaching the limits with your camera, which I say as a compliment.

This is a slabbed coin. It's very difficult to image coins in slabs; the plastic will create problems with contrast. I know you're not going to crack it, but you'd get better shots if you did.

More light runs the risk of washing out the coin; the problem is one of contrast rather than brightness. It seems like you're using a light at about 2:00 to the coin; a second, similar light at 10:00 might help. The exposure speed will become much faster, of course, so it might be worth experimenting.

Your images include EXIF data, so I'm able to see what you were using for aperture and exposure. I don't know if you're doing this on Automatic or manual settings; if you're doing Manual, try forcing the aperture down to f/5.6 to see what result you'll get.

They're nicely focused and quite sharp. At this point, I'm thinking you might want to consider learning the postprocessing end of things. One can play with contrast and sharpness, and maybe get some incremental improvements in the image:

Good point.

As far as distance goes, nolawyer, leave it just where it is. You're getting the perfect size, and nice focus, at the distance you're shooting. Now it's time to learn how to adjust the lighting to help - you have the camera end figured out.

Nice.

Consider a second, identical light. Orient them at 10:00 and 2:00 to the coin as you show them here. I don't know what type of lamp you're using; the closer to vertical above the coin you can come (understanding the camera's also there too), the more options you'll have to play.

You will find with many coins that the same rules which work for the obverse don't work for the reverse.