Whatever the camera, the important thing is that it must be mounted securely so there is absolutely no movement from vibrations. A $2000 camera mounted insecurely will produce worse photos than an old used digital used properly. You can buy a really good tripod for a few hundred but this note is to suggest that you can accomplish what is needed much more simply. My photo shows an 11 year old Nikon Coolpix 990 (my first digital camera with 3.4 megapixels which is much less than most cameras sold today). Instead of a tripod, it is mounted on a wood stand I built from two scraps. They are attached with one screw only because I cut a notch that would prevent movement but you might prefer two screws or some glue if you are not into cutting notches in wood. On the upright piece, I drilled a 1/4" hole which allowed the camera to be attached to the stand with a bolt. I used a fancy one sold by my hardware store but you can assemble it with an ordinary 1/4" bolt if you prefer to save a few cents.

Placement of the hole, length of the upright and size of the base piece are things that will vary from camera to camera. Many will benefit from the addition of a second thickness of wood at the top so the camera is held away from the upright keeping it out of the picture. I recommend starting with larger wood and drilling more than one hole until you find the measurement that works for your camera. It is easy later to cut off excess. Notice that I sit the coin on a short piece if dowel. If you have a longer upright, you might use a longer dowel sized to place the coin where you want it. You don't have to use the dowel support but they are easier to cut than the bigger boards so the choice is yours. As shown with this camera, I can shoot denarii and sestertii with this dowel piece using the camera zoom. If your camera does not zoom in macro range, you might want to cut several dowels that cover the range of distances you will be shooting.

Would a tripod be better? No, actually this is more secure since the lightweight camera and platform are firmly attached to each other while any small tripod will have some wiggle. This requires a little planning (trial and error works) to get the spacings just right but once made, this will shoot a lot of coins quickly and easily. Lighting? Start by working near a window in indirect light or outside in open shade. You can add lights to your rig later if you want. The purpose of this image is to show the stand, not to discuss lighting options. The sample was taken in natural daylight through a window. ...and yes, as a matter of fact, the sample coin on the left is a modern fake.