I'm far from being a photographer but I understand that some cameras just don't do well with macro shots of coins. Mine is a 10 year old Nikon Coolpix 4300.
here's a shot that came out pretty dang good.... This was taken in my man cave on top of ol' gnarly. I switched out my old bulb with a new LED bulb, used my same set up with the addition of a piece from my leaf blower...LOL! i'll work some more tomorrow. i actually had fun taking coin pics today, weird.
What are you using to "suspend" your coin? I was playing around a few weeks ago and used something TIF didn't like. I know its irrelevant as it can be blacked out. Actually what I had rigged up looked a lot like what you have there, minor differances.
http://www.trustedreviews.com/kodak-easyshare-m530-specs As I read the specs, the m530 has no manual exposure and no manual focus. I would suggest a different camera. The Nikon 4300 was an later upgrade from the makers of my now 17 year old Coolpix 990 I used for the plate photos for the Failmezger book. They were excellent for coins for the day. The 990 was not capable of macrofocus all the way to the telephoto end of the zoom but it was usable. The 4300 was criticized for having manual controls hidden in the menus rather than easily found on the outside of the camera but at least it had them.
Lol. That's funny. I had a stax can I had cut, then I had a mesh bag I cut intending to black it later. TIF was displeased so I tried thread. Didn't work well. The light I use 1 sometimes 2 LED lamps, usually just the one. Maybe I can salvage some of what I had. I just over thought it.
LOL! Don't let me stop your experimentation . Maybe you'll come up with something innovative. ... Nice work, Chris! Man, I really need to make one of those "black hole" light sinks. Not sure why I haven't yet since I have the rest of the rig worked out pretty well.