What makes a good photo?
PR photos should be high-res, at least 300 dpi and nine inches on longest side. Clear images with good lighting and composition are key. Larger photos are preferred because an image can retain quality if it must be sized down, but quality is lost when enlarged. Mobile device cameras are improving, but photos from digital SLRs are still preferred.
Also, action shots are more interesting to viewers. Show the subject doing something instead of having them pose. Posed large group shots don’t always read well and are less likely to grab attention.
Professional photographers are often the way to go. They have experience getting the best shots and top-of-the-line equipment.