He're what I do. I use my Iphone with whatever loop I require for the job. For example all you have to do is place the loop over the lens and then focus as required. You can get apps to enhance your photo ability. In short this does all I require to get good results. I might add that I use an LED light and try and find a background that shows a contrast of the coin. I'm no Pro. Just a guy who's had to make due.