color's looking very nice, your starting to get the hang of your camera, it just takes time tweeking the settings to get what you need,,,,your at 2 inches from the coin..your canon has the 1.5X zoom I think?...max may be 2? not sure on your camera, but with my AS3100, I was able to be father from the coin letting more balanced lighting on the coin, for me 2X was so so, and 1.5X was much better results...as I believe you can still have the "Macro" function on...and now your about say around 6 to 8 inches from the coin,one can see when moving the lighting upon the coin in the view finder,
the best overall lighting and details that show up on the coin before you take the shot....This also allows more room for diffusion techniques...As Brg5658 suggests......I do like the simple menu Canon has for these type cameras, very, VERY easy to use...