The photos taken by Foxconn X-E 1 in the studio are a little gray. How to adjust it?

This gray, there are only three possibilities, 1 dirty your lens. The contrast set by your camera is too low. 3 is usually the biggest factor, because you use it incorrectly. This gray color is usually caused by backlight. If you want to give people the feeling of backlight without making the film gray, you can use reflective flags to block it, which can effectively avoid gray and lens halo.