The best camera is the one that's with you.
Not only is smartphone clinical photography good for quickly snapping a photo of a patient and sending to another doctor to get another opinion, a study published in the Journal of Paediatrics and Child Health found that smartphone photos taken of X-ray images can be just as effective as the standard films.
There is still going to be a place for traditional clinical photography but for the vast majority of the use cases we see when a smartphone is used, the quality is more than good enough. Common sense should always prevail, and medical decisions should not be made based on a photo if it is unclear.