The last ones are better. You just need to diffuse the light a bit to remove the glare.
How it that Done? Glad you asked. LOL To Diffuse light, you need to force the light to run through a curtain.
How do you make a curtain? A curtain can be made from a wire coat hanger. You know the that you hang clothes on that come back from the dry cleaners? Alter the metal hanger like this:

I know that the image is a plastic one, but harder to find a wire image online. So make in it a square, the tape some plastic grocery bag onto the frame. Try to see if one layer of plastic is enough, or two layers. This will remove the glare from you images. If not dense enough, try white bond paper to see of the will prevent the glare? The set the light so that is has to go through the diffuse and then to the coin. Then post your results to see if it works better, or not. If you are having secondary light issues (Window/room light/sunlight) then figure out the direction and block the light again with paper:


Make sure to use only one light for micro images, because that allow light and shadows to help show the contour on the coin.
This image was taken with a ring light:

While it looks OK, but not the fields. They look like glitter as it is too many light directions.


Note the light and shadow affects? That is what you need to see on your coin. It shows contour without spotlighting the coin. Also not the direction the light was used. I allowed the spread to be seen in the shadows. Most will take their light and then spotlight the area they want to show. On
Machine Doubling, this causes glare:

Note on this cent, they did just that. Spotlighted the
Machine Doubling. They see the
Machine Doubling and feel it is a doubled die, but on the image, all we see is glare. Bu inverting the colors, (image on the right, then we can see what they were seeing, but the glare hides. So if there is doubling that you want to show, rotate the coin to allow the shadow to fall on the spread area.

Allow the shadow to fall on the spread. That makes it stand out. Hope this helps to be able to use the light to your advantage, other than just illuminating the coin. Just like salt, too much is too much and a little is just right. So use your light to get the best shot, not just accept just an image. Make it a great image.
CoopHome:
How can I get images I will be proud of?