For multiple coins, lay them out in a grid pattern so fewer images are needed.

Using good overhead lighting, bring the phone close to the coin without obstructing the light from the light source. At that point you can slightly zoom in to get the coin nicely framed in the shot.

For single coins, tap your finger to refocus the camera on the obverse (coin talk for “front”) of the coin and take the photo. Do the same for the reverse (back) of the coin. For grid photos, tap your finger to focus the camera on the coins in the middle area of the grid.

Take the shot and submit your photos for appraisal.