Can I get a camera that would be able to detect auras coming from metal?

Episode 1084 (45:50)

Alan from Marina Del Rey, CA

Alan is looking for a good digital camera with a specific feature. He needs one with a neutral density filter. Leo says that he can get neutral density filters for DSLRs, but for what Alan wants (which is to see "auras" of gold and other precious metals in the ground), it's snake oil. He's better off with a metal detector for that.