Simply put, I overexpose copor negative film, no quite as much as Mark(1 full stop)but by half a stop. I underexpose chromes by about a third of a stop. When photo'ing a person, place your incident meter under the subjects nose and aim it at the camera to get the proper reading. You are then reading the light falling on the subject, and getting the correct reading. If you stand at the camera and point the meter at the subject, you are reading the light falling on the camera, and getting the wrong reading.